20445406715635 has 48 divisors (see below), whose sum is σ = 28404484416000. Its totient is φ = 14078116388160.

The previous prime is 20445406715623. The next prime is 20445406715663. The reversal of 20445406715635 is 53651760454402.

It is not a de Polignac number, because 20445406715635 - 2⁵ = 20445406715603 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18155766 + ... + 19248964.

It is an arithmetic number, because the mean of its divisors is an integer number (591760092000).

Almost surely, 2^{20445406715635} is an apocalyptic number.

20445406715635 is a deficient number, since it is larger than the sum of its proper divisors (7959077700365).

20445406715635 is a wasteful number, since it uses less digits than its factorization.

20445406715635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094872 (or 1094861 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 20445406715635 in words is "twenty trillion, four hundred forty-five billion, four hundred six million, seven hundred fifteen thousand, six hundred thirty-five".