21120832 has 28 divisors (see below), whose sum is σ = 42058336. Its totient is φ = 10523520.

The previous prime is 21120829. The next prime is 21120833. The reversal of 21120832 is 23802112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120833) 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, 33157 + ... + 33787.

Almost surely, 2^21120832 is an apocalyptic number.

It is an amenable number.

21120832 is a deficient number, since it is larger than the sum of its proper divisors (20937504).

21120832 is an equidigital number, since it uses as much as digits as its factorization.

21120832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21120832 is about 4595.7406367200. The cubic root of 21120832 is about 276.4205588700.

Adding to 21120832 its reverse (23802112), we get a palindrome (44922944).

It can be divided in two parts, 21120 and 832, that added together give a cube (21952 = 28³).

The spelling of 21120832 in words is "twenty-one million, one hundred twenty thousand, eight hundred thirty-two".