21032124 has 48 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 6768256.

The previous prime is 21032119. The next prime is 21032153. The reversal of 21032124 is 42123012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49987 + ... + 50405.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^21032124 is an apocalyptic number.

It is an amenable number.

21032124 is an abundant number, since it is smaller than the sum of its proper divisors (29771076).

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

21032124 is a wasteful number, since it uses less digits than its factorization.

21032124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21032124 is about 4586.0793713149. The cubic root of 21032124 is about 276.0330248237.

Adding to 21032124 its reverse (42123012), we get a palindrome (63155136).

The spelling of 21032124 in words is "twenty-one million, thirty-two thousand, one hundred twenty-four".