20925456 has 20 divisors (see below), whose sum is σ = 54057552. Its totient is φ = 6975136.

The previous prime is 20925439. The next prime is 20925467. The reversal of 20925456 is 65452902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217926 + ... + 218021.

Almost surely, 2^20925456 is an apocalyptic number.

It is an amenable number.

20925456 is an abundant number, since it is smaller than the sum of its proper divisors (33132096).

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

20925456 is a wasteful number, since it uses less digits than its factorization.

20925456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435958 (or 435952 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 20925456 is about 4574.4350470850. The cubic root of 20925456 is about 275.5655841920.

The spelling of 20925456 in words is "twenty million, nine hundred twenty-five thousand, four hundred fifty-six".