20756043504 has 80 divisors (see below), whose sum is σ = 68088618240. Its totient is φ = 5930297280.

The previous prime is 20756043467. The next prime is 20756043533. The reversal of 20756043504 is 40534065702.

20756043504 is a `hidden beast` number, since 2 + 0 + 7 + 560 + 43 + 50 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3428862 + ... + 3434909.

It is an arithmetic number, because the mean of its divisors is an integer number (851107728).

Almost surely, 2^20756043504 is an apocalyptic number.

20756043504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20756043504 is an abundant number, since it is smaller than the sum of its proper divisors (47332574736).

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

20756043504 is a wasteful number, since it uses less digits than its factorization.

20756043504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863795 (or 6863783 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 20756043504 in words is "twenty billion, seven hundred fifty-six million, forty-three thousand, five hundred four".