21295236 has 24 divisors (see below), whose sum is σ = 50901984. Its totient is φ = 6925120.

The previous prime is 21295231. The next prime is 21295249. The reversal of 21295236 is 63259212.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21295231) 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, 21150 + ... + 22133.

It is an arithmetic number, because the mean of its divisors is an integer number (2120916).

Almost surely, 2^21295236 is an apocalyptic number.

It is an amenable number.

21295236 is an abundant number, since it is smaller than the sum of its proper divisors (29606748).

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

21295236 is a wasteful number, since it uses less digits than its factorization.

21295236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43331 (or 43329 counting only the distinct ones).

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

The square root of 21295236 is about 4614.6761533178. The cubic root of 21295236 is about 277.1793162689.

The spelling of 21295236 in words is "twenty-one million, two hundred ninety-five thousand, two hundred thirty-six".