20124864 has 42 divisors (see below), whose sum is σ = 57685940. Its totient is φ = 6708096.

The previous prime is 20124851. The next prime is 20124887. The reversal of 20124864 is 46842102.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16894 + ... + 18045.

Almost surely, 2^20124864 is an apocalyptic number.

20124864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20124864 is an abundant number, since it is smaller than the sum of its proper divisors (37561076).

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

20124864 is a wasteful number, since it uses less digits than its factorization.

20124864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34957 (or 34944 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20124864 is about 4486.0744532386. The cubic root of 20124864 is about 272.0054785517.

Adding to 20124864 its reverse (46842102), we get a palindrome (66966966).

The spelling of 20124864 in words is "twenty million, one hundred twenty-four thousand, eight hundred sixty-four".