139195020 has 24 divisors (see below), whose sum is σ = 389746224. Its totient is φ = 37118656.

The previous prime is 139195019. The next prime is 139195027. The reversal of 139195020 is 20591931.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (139195027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159899 + ... + 1160018.

It is an arithmetic number, because the mean of its divisors is an integer number (16239426).

Almost surely, 2^139195020 is an apocalyptic number.

139195020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139195020 is an abundant number, since it is smaller than the sum of its proper divisors (250551204).

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

139195020 is a wasteful number, since it uses less digits than its factorization.

139195020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319929 (or 2319927 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 139195020 is about 11798.0939138490. The cubic root of 139195020 is about 518.2522933330.

The spelling of 139195020 in words is "one hundred thirty-nine million, one hundred ninety-five thousand, twenty".