21625792 has 14 divisors (see below), whose sum is σ = 42913808. Its totient is φ = 10812864.

The previous prime is 21625787. The next prime is 21625811. The reversal of 21625792 is 29752612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168888 + ... + 169015.

It is an arithmetic number, because the mean of its divisors is an integer number (3065272).

Almost surely, 2^21625792 is an apocalyptic number.

It is an amenable number.

21625792 is a deficient number, since it is larger than the sum of its proper divisors (21288016).

21625792 is an equidigital number, since it uses as much as digits as its factorization.

21625792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337915 (or 337905 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 21625792 is about 4650.3539650224. The cubic root of 21625792 is about 278.6061339435.

The spelling of 21625792 in words is "twenty-one million, six hundred twenty-five thousand, seven hundred ninety-two".