20624517620 has 48 divisors (see below), whose sum is σ = 51095589888. Its totient is φ = 6843156480.

The previous prime is 20624517593. The next prime is 20624517631. The reversal of 20624517620 is 2671542602.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2371757 + ... + 2380436.

It is an arithmetic number, because the mean of its divisors is an integer number (1064491456).

Almost surely, 2^20624517620 is an apocalyptic number.

20624517620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20624517620 is an abundant number, since it is smaller than the sum of its proper divisors (30471072268).

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

20624517620 is a wasteful number, since it uses less digits than its factorization.

20624517620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752240 (or 4752238 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 20624517620 in words is "twenty billion, six hundred twenty-four million, five hundred seventeen thousand, six hundred twenty".