20620956 has 24 divisors (see below), whose sum is σ = 48795264. Its totient is φ = 6776560.

The previous prime is 20620927. The next prime is 20620961. The reversal of 20620956 is 65902602.

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 7 ways as a sum of consecutive naturals, for example, 11250 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (2033136).

Almost surely, 2^20620956 is an apocalyptic number.

It is an amenable number.

20620956 is an abundant number, since it is smaller than the sum of its proper divisors (28174308).

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

20620956 is a wasteful number, since it uses less digits than its factorization.

20620956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24281 (or 24279 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20620956 is about 4541.0302795731. The cubic root of 20620956 is about 274.2224027671. Note that the first 3 decimals are identical.

The spelling of 20620956 in words is "twenty million, six hundred twenty thousand, nine hundred fifty-six".