20624856 has 64 divisors (see below), whose sum is σ = 59270400. Its totient is φ = 5858688.

The previous prime is 20624843. The next prime is 20624881. The reversal of 20624856 is 65842602.

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, 49015 + ... + 49433.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

Almost surely, 2^20624856 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 20624856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29635200).

20624856 is an abundant number, since it is smaller than the sum of its proper divisors (38645544).

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

20624856 is a wasteful number, since it uses less digits than its factorization.

20624856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 20624856 is about 4541.4596772403. The cubic root of 20624856 is about 274.2396893881.

The spelling of 20624856 in words is "twenty million, six hundred twenty-four thousand, eight hundred fifty-six".