20724912 has 60 divisors (see below), whose sum is σ = 62468224. Its totient is φ = 6376320.

The previous prime is 20724889. The next prime is 20724929. The reversal of 20724912 is 21942702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3664 + ... + 7407.

Almost surely, 2^20724912 is an apocalyptic number.

It is an amenable number.

20724912 is an abundant number, since it is smaller than the sum of its proper divisors (41743312).

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

20724912 is a wasteful number, since it uses less digits than its factorization.

20724912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11098 (or 11089 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20724912 is about 4552.4621909468. The cubic root of 20724912 is about 274.6824411506.

The spelling of 20724912 in words is "twenty million, seven hundred twenty-four thousand, nine hundred twelve".