20639460570652 has 48 divisors (see below), whose sum is σ = 45033549619968. Its totient is φ = 8040991259520.

The previous prime is 20639460570647. The next prime is 20639460570661. The reversal of 20639460570652 is 25607506493602.

It is a junction number, because it is equal to n+sod(n) for n = 20639460570593 and 20639460570602.

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, 5514463 + ... + 8466889.

It is an arithmetic number, because the mean of its divisors is an integer number (938198950416).

Almost surely, 2^{20639460570652} is an apocalyptic number.

20639460570652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20639460570652 is an abundant number, since it is smaller than the sum of its proper divisors (24394089049316).

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

20639460570652 is a wasteful number, since it uses less digits than its factorization.

20639460570652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975146 (or 2975144 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 55.

The spelling of 20639460570652 in words is "twenty trillion, six hundred thirty-nine billion, four hundred sixty million, five hundred seventy thousand, six hundred fifty-two".