21266532 has 36 divisors (see below), whose sum is σ = 61437376. Its totient is φ = 6076080.

The previous prime is 21266521. The next prime is 21266551. The reversal of 21266532 is 23566212.

21266532 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 653 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 21266496 and 21266505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41944 + ... + 42447.

Almost surely, 2^21266532 is an apocalyptic number.

It is an amenable number.

21266532 is an abundant number, since it is smaller than the sum of its proper divisors (40170844).

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

21266532 is a wasteful number, since it uses less digits than its factorization.

21266532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84408 (or 84403 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 21266532 is about 4611.5650271898. The cubic root of 21266532 is about 277.0547229484.

The spelling of 21266532 in words is "twenty-one million, two hundred sixty-six thousand, five hundred thirty-two".