20624357628 has 36 divisors (see below), whose sum is σ = 59581478320. Its totient is φ = 5892673536.

The previous prime is 20624357617. The next prime is 20624357639. The reversal of 20624357628 is 82675342602.

20624357628 is a `hidden beast` number, since 206 + 2 + 435 + 7 + 6 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (20624357617) and next prime (20624357639).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40921093 + ... + 40921596.

Almost surely, 2^20624357628 is an apocalyptic number.

20624357628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20624357628 is an abundant number, since it is smaller than the sum of its proper divisors (38957120692).

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

20624357628 is a wasteful number, since it uses less digits than its factorization.

20624357628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81842706 (or 81842701 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 20624357628 in words is "twenty billion, six hundred twenty-four million, three hundred fifty-seven thousand, six hundred twenty-eight".