21675232 has 24 divisors (see below), whose sum is σ = 43119216. Its totient is φ = 10724352.

The previous prime is 21675211. The next prime is 21675239. The reversal of 21675232 is 23257612.

It is a self number, because there is not a number n which added to its sum of digits gives 21675232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21675239) 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, 388 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (1796634).

Almost surely, 2^21675232 is an apocalyptic number.

It is an amenable number.

21675232 is a deficient number, since it is larger than the sum of its proper divisors (21443984).

21675232 is an equidigital number, since it uses as much as digits as its factorization.

21675232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7090 (or 7082 counting only the distinct ones).

The product of its digits is 5040, while the sum is 28.

The square root of 21675232 is about 4655.6666547338. Note that the first 4 decimals coincide. The cubic root of 21675232 is about 278.8182849997.

The spelling of 21675232 in words is "twenty-one million, six hundred seventy-five thousand, two hundred thirty-two".