20475736875 has 200 divisors, whose sum is σ = 42294111552. Its totient is φ = 9785880000.

The previous prime is 20475736847. The next prime is 20475736903. The reversal of 20475736875 is 57863757402.

It is a happy number.

20475736875 is a `hidden beast` number, since 2 + 0 + 4 + 7 + 573 + 68 + 7 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (20475736847) and next prime (20475736903).

It is a de Polignac number, because none of the positive numbers 2^k-20475736875 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 46220404 + ... + 46220846.

Almost surely, 2^20475736875 is an apocalyptic number.

20475736875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20475736875 is an abundant number, since it is smaller than the sum of its proper divisors (21818374677).

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

20475736875 is an equidigital number, since it uses as much as digits as its factorization.

20475736875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 54.

The spelling of 20475736875 in words is "twenty billion, four hundred seventy-five million, seven hundred thirty-six thousand, eight hundred seventy-five".