20475761256 has 64 divisors (see below), whose sum is σ = 57579350400. Its totient is φ = 6825247920.

The previous prime is 20475761249. The next prime is 20475761263. The reversal of 20475761256 is 65216757402.

20475761256 is a `hidden beast` number, since 20 + 4 + 7 + 5 + 7 + 612 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (20475761249) and next prime (20475761263).

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, 567660 + ... + 602651.

It is an arithmetic number, because the mean of its divisors is an integer number (899677350).

Almost surely, 2^20475761256 is an apocalyptic number.

It is an amenable number.

20475761256 is an abundant number, since it is smaller than the sum of its proper divisors (37103589144).

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

20475761256 is an equidigital number, since it uses as much as digits as its factorization.

20475761256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170338 (or 1170316 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 20475761256 in words is "twenty billion, four hundred seventy-five million, seven hundred sixty-one thousand, two hundred fifty-six".