20442466604664 has 72 divisors (see below), whose sum is σ = 59951464597440. Its totient is φ = 6289989720768.

The previous prime is 20442466604647. The next prime is 20442466604671. The reversal of 20442466604664 is 46640666424402.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 20442466604664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 839997144 + ... + 840021479.

It is an arithmetic number, because the mean of its divisors is an integer number (832659230520).

Almost surely, 2^{20442466604664} is an apocalyptic number.

20442466604664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20442466604664 is an abundant number, since it is smaller than the sum of its proper divisors (39508997992776).

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

20442466604664 is a wasteful number, since it uses less digits than its factorization.

20442466604664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680018661 (or 1680018641 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 54.

The spelling of 20442466604664 in words is "twenty trillion, four hundred forty-two billion, four hundred sixty-six million, six hundred four thousand, six hundred sixty-four".