20572984 has 16 divisors (see below), whose sum is σ = 38880000. Its totient is φ = 10204992.

The previous prime is 20572931. The next prime is 20573011. The reversal of 20572984 is 48927502.

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, 9109 + ... + 11140.

It is an arithmetic number, because the mean of its divisors is an integer number (2430000).

Almost surely, 2^20572984 is an apocalyptic number.

It is an amenable number.

20572984 is a deficient number, since it is larger than the sum of its proper divisors (18307016).

20572984 is a wasteful number, since it uses less digits than its factorization.

20572984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20382 (or 20378 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20572984 is about 4535.7451427522. The cubic root of 20572984 is about 274.0095899462.

It can be divided in two parts, 2057 and 2984, that added together give a square (5041 = 71²).

The spelling of 20572984 in words is "twenty million, five hundred seventy-two thousand, nine hundred eighty-four".