20624646 has 32 divisors (see below), whose sum is σ = 47278080. Its totient is φ = 5875776.

The previous prime is 20624623. The next prime is 20624657. The reversal of 20624646 is 64642602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25090 + ... + 25898.

It is an arithmetic number, because the mean of its divisors is an integer number (1477440).

Almost surely, 2^20624646 is an apocalyptic number.

20624646 is an abundant number, since it is smaller than the sum of its proper divisors (26653434).

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

20624646 is a wasteful number, since it uses less digits than its factorization.

20624646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 20624646 is about 4541.4365568617. The cubic root of 20624646 is about 274.2387586256.

The spelling of 20624646 in words is "twenty million, six hundred twenty-four thousand, six hundred forty-six".