20772508 has 6 divisors (see below), whose sum is σ = 36351896. Its totient is φ = 10386252.

The previous prime is 20772481. The next prime is 20772517. The reversal of 20772508 is 80527702.

It is a super-2 number, since 2×20772508² = 862994177220128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20772508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2596560 + ... + 2596567.

Almost surely, 2^20772508 is an apocalyptic number.

It is an amenable number.

20772508 is a deficient number, since it is larger than the sum of its proper divisors (15579388).

20772508 is a wasteful number, since it uses less digits than its factorization.

20772508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193131 (or 5193129 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 20772508 is about 4557.6866939271. The cubic root of 20772508 is about 274.8925552711.

The spelling of 20772508 in words is "twenty million, seven hundred seventy-two thousand, five hundred eight".