20772888 has 16 divisors (see below), whose sum is σ = 51932280. Its totient is φ = 6924288.

The previous prime is 20772877. The next prime is 20772901. The reversal of 20772888 is 88827702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432745 + ... + 432792.

Almost surely, 2^20772888 is an apocalyptic number.

It is an amenable number.

20772888 is an abundant number, since it is smaller than the sum of its proper divisors (31159392).

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

20772888 is a wasteful number, since it uses less digits than its factorization.

20772888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865546 (or 865542 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 20772888 is about 4557.7283815515. The cubic root of 20772888 is about 274.8942315016.

The spelling of 20772888 in words is "twenty million, seven hundred seventy-two thousand, eight hundred eighty-eight".