20872824 has 48 divisors (see below), whose sum is σ = 60705000. Its totient is φ = 5963328.

The previous prime is 20872807. The next prime is 20872853. The reversal of 20872824 is 42827802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7699 + ... + 10050.

Almost surely, 2^20872824 is an apocalyptic number.

20872824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20872824 is an abundant number, since it is smaller than the sum of its proper divisors (39832176).

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

20872824 is a wasteful number, since it uses less digits than its factorization.

20872824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17772 (or 17761 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 20872824 is about 4568.6785835732. The cubic root of 20872824 is about 275.3343547474.

The spelling of 20872824 in words is "twenty million, eight hundred seventy-two thousand, eight hundred twenty-four".