20772572 has 12 divisors (see below), whose sum is σ = 38490480. Its totient is φ = 9775296.

The previous prime is 20772559. The next prime is 20772581. The reversal of 20772572 is 27527702.

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, 152672 + ... + 152807.

It is an arithmetic number, because the mean of its divisors is an integer number (3207540).

Almost surely, 2^20772572 is an apocalyptic number.

It is an amenable number.

20772572 is a deficient number, since it is larger than the sum of its proper divisors (17717908).

20772572 is a wasteful number, since it uses less digits than its factorization.

20772572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305500 (or 305498 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 20772572 is about 4557.6937150274. The cubic root of 20772572 is about 274.8928375851.

It can be divided in two parts, 2077257 and 2, that multiplied together give a palindrome (4154514).

The spelling of 20772572 in words is "twenty million, seven hundred seventy-two thousand, five hundred seventy-two".