20720652 has 24 divisors (see below), whose sum is σ = 48449856. Its totient is φ = 6892368.

The previous prime is 20720633. The next prime is 20720653. The reversal of 20720652 is 25602702.

It is not an unprimeable number, because it can be changed into a prime (20720653) 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, 5223 + ... + 8289.

It is an arithmetic number, because the mean of its divisors is an integer number (2018744).

Almost surely, 2^20720652 is an apocalyptic number.

It is an amenable number.

20720652 is an abundant number, since it is smaller than the sum of its proper divisors (27729204).

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

20720652 is a wasteful number, since it uses less digits than its factorization.

20720652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3637 (or 3635 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20720652 is about 4551.9942882214. The cubic root of 20720652 is about 274.6636195607.

The spelling of 20720652 in words is "twenty million, seven hundred twenty thousand, six hundred fifty-two".