21265352 has 32 divisors (see below), whose sum is σ = 41860800. Its totient is φ = 10113600.

The previous prime is 21265337. The next prime is 21265373. The reversal of 21265352 is 25356212.

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, 15827 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (1308150).

Almost surely, 2^21265352 is an apocalyptic number.

It is an amenable number.

21265352 is a deficient number, since it is larger than the sum of its proper divisors (20595448).

21265352 is a wasteful number, since it uses less digits than its factorization.

21265352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1393 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 21265352 is about 4611.4370862021. The cubic root of 21265352 is about 277.0495986116.

The spelling of 21265352 in words is "twenty-one million, two hundred sixty-five thousand, three hundred fifty-two".