20831324 has 24 divisors (see below), whose sum is σ = 38955168. Its totient is φ = 9712640.

The previous prime is 20831323. The next prime is 20831533. The reversal of 20831324 is 42313802.

It is a self number, because there is not a number n which added to its sum of digits gives 20831324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20831323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6329 + ... + 9039.

It is an arithmetic number, because the mean of its divisors is an integer number (1623132).

Almost surely, 2^20831324 is an apocalyptic number.

It is an amenable number.

20831324 is a deficient number, since it is larger than the sum of its proper divisors (18123844).

20831324 is a wasteful number, since it uses less digits than its factorization.

20831324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845 (or 2843 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20831324 is about 4564.1345291304. The cubic root of 20831324 is about 275.1517575602.

The spelling of 20831324 in words is "twenty million, eight hundred thirty-one thousand, three hundred twenty-four".