20572672 has 40 divisors (see below), whose sum is σ = 42916896. Its totient is φ = 9833472.

The previous prime is 20572663. The next prime is 20572691. The reversal of 20572672 is 27627502.

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, 10903 + ... + 12649.

Almost surely, 2^20572672 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 20572672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21458448).

20572672 is an abundant number, since it is smaller than the sum of its proper divisors (22344224).

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

20572672 is an equidigital number, since it uses as much as digits as its factorization.

20572672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20572672 is about 4535.7107491550. The cubic root of 20572672 is about 274.0082047732.

The spelling of 20572672 in words is "twenty million, five hundred seventy-two thousand, six hundred seventy-two".