20652980 has 12 divisors (see below), whose sum is σ = 43371300. Its totient is φ = 8261184.

The previous prime is 20652967. The next prime is 20653001. The reversal of 20652980 is 8925602.

It can be written as a sum of positive squares in 2 ways, for example, as 8514724 + 12138256 = 2918^2 + 3484^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516305 + ... + 516344.

It is an arithmetic number, because the mean of its divisors is an integer number (3614275).

Almost surely, 2^20652980 is an apocalyptic number.

20652980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20652980 is an abundant number, since it is smaller than the sum of its proper divisors (22718320).

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

20652980 is a wasteful number, since it uses less digits than its factorization.

20652980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032658 (or 1032656 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20652980 is about 4544.5549837140. The cubic root of 20652980 is about 274.3642836155.

The spelling of 20652980 in words is "twenty million, six hundred fifty-two thousand, nine hundred eighty".