21376832 has 28 divisors (see below), whose sum is σ = 42647616. Its totient is φ = 10631040.

The previous prime is 21376829. The next prime is 21376841. The reversal of 21376832 is 23867312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12713 + ... + 14295.

Almost surely, 2^21376832 is an apocalyptic number.

It is an amenable number.

21376832 is a deficient number, since it is larger than the sum of its proper divisors (21270784).

21376832 is a wasteful number, since it uses less digits than its factorization.

21376832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1796 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 21376832 is about 4623.5086244107. The cubic root of 21376832 is about 277.5328835852.

The spelling of 21376832 in words is "twenty-one million, three hundred seventy-six thousand, eight hundred thirty-two".