20006604644664 has 64 divisors (see below), whose sum is σ = 54569783543040. Its totient is φ = 6061905653760.

The previous prime is 20006604644627. The next prime is 20006604644723. The reversal of 20006604644664 is 46644640660002.

It is a super-2 number, since 2×20006604644664² (a number of 27 digits) contains 22 as substring.

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, 2099209 + ... + 6664824.

It is an arithmetic number, because the mean of its divisors is an integer number (852652867860).

Almost surely, 2^{20006604644664} is an apocalyptic number.

20006604644664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20006604644664 is an abundant number, since it is smaller than the sum of its proper divisors (34563178898376).

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

20006604644664 is a wasteful number, since it uses less digits than its factorization.

20006604644664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8772700 (or 8772696 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 20006604644664 in words is "twenty trillion, six billion, six hundred four million, six hundred forty-four thousand, six hundred sixty-four".