21266032 has 10 divisors (see below), whose sum is σ = 41202968. Its totient is φ = 10633008.

The previous prime is 21266029. The next prime is 21266033. The reversal of 21266032 is 23066212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21265994 and 21266012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21266033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664548 + ... + 664579.

Almost surely, 2^21266032 is an apocalyptic number.

It is an amenable number.

21266032 is a deficient number, since it is larger than the sum of its proper divisors (19936936).

21266032 is a wasteful number, since it uses less digits than its factorization.

21266032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329135 (or 1329129 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21266032 is about 4611.5108153402. The cubic root of 21266032 is about 277.0525516424.

The spelling of 21266032 in words is "twenty-one million, two hundred sixty-six thousand, thirty-two".