20572916 has 24 divisors (see below), whose sum is σ = 44311680. Its totient is φ = 8138592.

The previous prime is 20572913. The next prime is 20572931. The reversal of 20572916 is 61927502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20572913) 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, 27896 + ... + 28623.

It is an arithmetic number, because the mean of its divisors is an integer number (1846320).

Almost surely, 2^20572916 is an apocalyptic number.

20572916 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20572916 is an abundant number, since it is smaller than the sum of its proper divisors (23738764).

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

20572916 is a wasteful number, since it uses less digits than its factorization.

20572916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56543 (or 56541 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 20572916 is about 4535.7376467340. The cubic root of 20572916 is about 274.0092880507.

The spelling of 20572916 in words is "twenty million, five hundred seventy-two thousand, nine hundred sixteen".