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139000020 = 22352316667
BaseRepresentation
bin10000100100011…
…11100011010100
3100200112221011220
420102033203110
5241041000040
621443130340
73305323605
oct1022174324
9320487156
10139000020
1171509855
123a6739b0
1322a4a143
1414663dac
15c30a2d0
hex848f8d4

139000020 has 24 divisors (see below), whose sum is σ = 389200224. Its totient is φ = 37066656.

The previous prime is 139000019. The next prime is 139000021. The reversal of 139000020 is 20000931.

139000020 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139000019) and next prime (139000021).

It is a Harshad number since it is a multiple of its sum of digits (15).

139000020 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139000021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1158274 + ... + 1158393.

It is an arithmetic number, because the mean of its divisors is an integer number (16216676).

Almost surely, 2139000020 is an apocalyptic number.

139000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139000020 is an abundant number, since it is smaller than the sum of its proper divisors (250200204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139000020 is a wasteful number, since it uses less digits than its factorization.

139000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316679 (or 2316677 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 139000020 is about 11789.8269707405. The cubic root of 139000020 is about 518.0101715826.

Adding to 139000020 its reverse (20000931), we get a palindrome (159000951).

The spelling of 139000020 in words is "one hundred thirty-nine million, twenty", and thus it is an aban number.

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 2316667 4633334 6950001 9266668 11583335 13900002 23166670 27800004 34750005 46333340 69500010 139000020