20925942875 has 16 divisors (see below), whose sum is σ = 26120072160. Its totient is φ = 16737872800.

The previous prime is 20925942871. The next prime is 20925942881. The reversal of 20925942875 is 57824952902.

It is not a de Polignac number, because 20925942875 - 2² = 20925942871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20925942871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998252 + ... + 1018998.

It is an arithmetic number, because the mean of its divisors is an integer number (1632504510).

Almost surely, 2^20925942875 is an apocalyptic number.

20925942875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20925942875 is a deficient number, since it is larger than the sum of its proper divisors (5194129285).

20925942875 is an equidigital number, since it uses as much as digits as its factorization.

20925942875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28831 (or 28821 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 20925942875 in words is "twenty billion, nine hundred twenty-five million, nine hundred forty-two thousand, eight hundred seventy-five".