21265696 has 24 divisors (see below), whose sum is σ = 42244524. Its totient is φ = 10536960.

The previous prime is 21265687. The next prime is 21265697. The reversal of 21265696 is 69656212.

It can be written as a sum of positive squares in 2 ways, for example, as 20830096 + 435600 = 4564^2 + 660^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21265697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676 + ... + 6556.

Almost surely, 2^21265696 is an apocalyptic number.

It is an amenable number.

21265696 is a deficient number, since it is larger than the sum of its proper divisors (20978828).

21265696 is a wasteful number, since it uses less digits than its factorization.

21265696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004 (or 5996 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 21265696 is about 4611.4743846193. The cubic root of 21265696 is about 277.0510925056.

The spelling of 21265696 in words is "twenty-one million, two hundred sixty-five thousand, six hundred ninety-six".