20772684 has 36 divisors (see below), whose sum is σ = 53630304. Its totient is φ = 6776352.

The previous prime is 20772667. The next prime is 20772707. The reversal of 20772684 is 48627702.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 4447 + ... + 7830.

Almost surely, 2^20772684 is an apocalyptic number.

It is an amenable number.

20772684 is an abundant number, since it is smaller than the sum of its proper divisors (32857620).

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

20772684 is a wasteful number, since it uses less digits than its factorization.

20772684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12334 (or 12329 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 20772684 is about 4557.7060019268. The cubic root of 20772684 is about 274.8933316330.

It can be divided in two parts, 2077 and 2684, that added together give a square (4761 = 69²).

The spelling of 20772684 in words is "twenty million, seven hundred seventy-two thousand, six hundred eighty-four".