20331984 has 40 divisors (see below), whose sum is σ = 52686112. Its totient is φ = 6756480.

The previous prime is 20331967. The next prime is 20331989. The reversal of 20331984 is 48913302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29079 + ... + 29769.

Almost surely, 2^20331984 is an apocalyptic number.

20331984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20331984 is an abundant number, since it is smaller than the sum of its proper divisors (32354128).

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

20331984 is a wasteful number, since it uses less digits than its factorization.

20331984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20331984 is about 4509.1001319554. The cubic root of 20331984 is about 272.9354326768.

The spelling of 20331984 in words is "twenty million, three hundred thirty-one thousand, nine hundred eighty-four".