20956875 has 20 divisors (see below), whose sum is σ = 34920072. Its totient is φ = 11176000.

The previous prime is 20956861. The next prime is 20956907. The reversal of 20956875 is 57865902.

It is not a de Polignac number, because 20956875 - 2⁵ = 20956843 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3714 + ... + 7463.

Almost surely, 2^20956875 is an apocalyptic number.

20956875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20956875 is a deficient number, since it is larger than the sum of its proper divisors (13963197).

20956875 is an equidigital number, since it uses as much as digits as its factorization.

20956875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11200 (or 11185 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 20956875 is about 4577.8679535347. The cubic root of 20956875 is about 275.7034332860.

The spelling of 20956875 in words is "twenty million, nine hundred fifty-six thousand, eight hundred seventy-five".