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20760740 = 225711131761
BaseRepresentation
bin100111100110…
…0100010100100
31110001202101022
41033030202210
520303320430
62020550312
7341314640
oct117144244
943052338
1020760740
111079a940
126b52398
1343bb780
142a85c20
151c514e5
hex13cc8a4

20760740 has 192 divisors, whose sum is σ = 62995968. Its totient is φ = 5529600.

The previous prime is 20760721. The next prime is 20760767. The reversal of 20760740 is 4706702.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 340310 + ... + 340370.

It is an arithmetic number, because the mean of its divisors is an integer number (328104).

Almost surely, 220760740 is an apocalyptic number.

20760740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20760740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31497984).

20760740 is an abundant number, since it is smaller than the sum of its proper divisors (42235228).

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

20760740 is a wasteful number, since it uses less digits than its factorization.

20760740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20760740 is about 4556.3955052212. The cubic root of 20760740 is about 274.8406349370.

The spelling of 20760740 in words is "twenty million, seven hundred sixty thousand, seven hundred forty".