20475912 has 32 divisors (see below), whose sum is σ = 52382880. Its totient is φ = 6666240.

The previous prime is 20475907. The next prime is 20475913. The reversal of 20475912 is 21957402.

It is a self number, because there is not a number n which added to its sum of digits gives 20475912.

It is not an unprimeable number, because it can be changed into a prime (20475913) 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, 8889 + ... + 10952.

It is an arithmetic number, because the mean of its divisors is an integer number (1636965).

Almost surely, 2^20475912 is an apocalyptic number.

It is an amenable number.

20475912 is an abundant number, since it is smaller than the sum of its proper divisors (31906968).

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

20475912 is a wasteful number, since it uses less digits than its factorization.

20475912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19893 (or 19889 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 20475912 is about 4525.0317125961. The cubic root of 20475912 is about 273.5779461380.

The spelling of 20475912 in words is "twenty million, four hundred seventy-five thousand, nine hundred twelve".