20712944 has 40 divisors (see below), whose sum is σ = 46172640. Its totient is φ = 8817408.

The previous prime is 20712917. The next prime is 20712973. The reversal of 20712944 is 44921702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18842 + ... + 19910.

It is an arithmetic number, because the mean of its divisors is an integer number (1154316).

Almost surely, 2^20712944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20712944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23086320).

20712944 is an abundant number, since it is smaller than the sum of its proper divisors (25459696).

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

20712944 is a wasteful number, since it uses less digits than its factorization.

20712944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20712944 is about 4551.1475475972. The cubic root of 20712944 is about 274.6295574126.

The spelling of 20712944 in words is "twenty million, seven hundred twelve thousand, nine hundred forty-four".