20625626620 has 12 divisors (see below), whose sum is σ = 43313815944. Its totient is φ = 8250250640.

The previous prime is 20625626563. The next prime is 20625626621. The reversal of 20625626620 is 2662652602.

It is a self number, because there is not a number n which added to its sum of digits gives 20625626620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20625626621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515640646 + ... + 515640685.

It is an arithmetic number, because the mean of its divisors is an integer number (3609484662).

Almost surely, 2^20625626620 is an apocalyptic number.

20625626620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20625626620 is an abundant number, since it is smaller than the sum of its proper divisors (22688189324).

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

20625626620 is a wasteful number, since it uses less digits than its factorization.

20625626620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031281340 (or 1031281338 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 20625626620 in words is "twenty billion, six hundred twenty-five million, six hundred twenty-six thousand, six hundred twenty".