20772516 has 24 divisors (see below), whose sum is σ = 48543264. Its totient is φ = 6913600.

The previous prime is 20772481. The next prime is 20772517. The reversal of 20772516 is 61527702.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20772517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13591 + ... + 15041.

It is an arithmetic number, because the mean of its divisors is an integer number (2022636).

Almost surely, 2^20772516 is an apocalyptic number.

It is an amenable number.

20772516 is an abundant number, since it is smaller than the sum of its proper divisors (27770748).

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

20772516 is a wasteful number, since it uses less digits than its factorization.

20772516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 20772516 is about 4557.6875715652. The cubic root of 20772516 is about 274.8925905604.

The spelling of 20772516 in words is "twenty million, seven hundred seventy-two thousand, five hundred sixteen".