20475956 has 24 divisors (see below), whose sum is σ = 38255616. Its totient is φ = 9555840.

The previous prime is 20475953. The next prime is 20475971. The reversal of 20475956 is 65957402.

It is a happy number.

It is a super-2 number, since 2×20475956² = 838529548227872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20475953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7451 + ... + 9821.

It is an arithmetic number, because the mean of its divisors is an integer number (1593984).

Almost surely, 2^20475956 is an apocalyptic number.

It is an amenable number.

20475956 is a deficient number, since it is larger than the sum of its proper divisors (17779660).

20475956 is a wasteful number, since it uses less digits than its factorization.

20475956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519 (or 2517 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 20475956 is about 4525.0365744378. The cubic root of 20475956 is about 273.5781420986.

The spelling of 20475956 in words is "twenty million, four hundred seventy-five thousand, nine hundred fifty-six".