21925536 has 48 divisors (see below), whose sum is σ = 57806784. Its totient is φ = 7276544.

The previous prime is 21925523. The next prime is 21925567. The reversal of 21925536 is 63552912.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21925497 and 21925506.

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 7 ways as a sum of consecutive naturals, for example, 33565 + ... + 34211.

It is an arithmetic number, because the mean of its divisors is an integer number (1204308).

Almost surely, 2^21925536 is an apocalyptic number.

It is an amenable number.

21925536 is an abundant number, since it is smaller than the sum of its proper divisors (35881248).

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

21925536 is a wasteful number, since it uses less digits than its factorization.

21925536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1005 counting only the distinct ones).

The product of its digits is 16200, while the sum is 33.

The square root of 21925536 is about 4682.4711424631. The cubic root of 21925536 is about 279.8874377483.

The spelling of 21925536 in words is "twenty-one million, nine hundred twenty-five thousand, five hundred thirty-six".