21252936 has 32 divisors (see below), whose sum is σ = 53929440. Its totient is φ = 6978048.

The previous prime is 21252919. The next prime is 21252953. The reversal of 21252936 is 63925212.

It is an interprime number because it is at equal distance from previous prime (21252919) and next prime (21252953).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5001 + ... + 8216.

It is an arithmetic number, because the mean of its divisors is an integer number (1685295).

Almost surely, 2^21252936 is an apocalyptic number.

It is an amenable number.

21252936 is an abundant number, since it is smaller than the sum of its proper divisors (32676504).

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

21252936 is a wasteful number, since it uses less digits than its factorization.

21252936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13293 (or 13289 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 21252936 is about 4610.0906715595. The cubic root of 21252936 is about 276.9956686712.

The spelling of 21252936 in words is "twenty-one million, two hundred fifty-two thousand, nine hundred thirty-six".