20660464442000 has 80 divisors (see below), whose sum is σ = 50052892307184. Its totient is φ = 8248323200000.

The previous prime is 20660464441999. The next prime is 20660464442021. The reversal of 20660464442000 is 24446406602.

It can be written as a sum of positive squares in 8 ways, for example, as 5525376774544 + 15135087667456 = 2350612^2 + 3890384^2 .

It is a tau number, because it is divible by the number of its divisors (80).

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, 8871851 + ... + 10955850.

Almost surely, 2^{20660464442000} is an apocalyptic number.

20660464442000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20660464442000 is an abundant number, since it is smaller than the sum of its proper divisors (29392427865184).

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

20660464442000 is a wasteful number, since it uses less digits than its factorization.

20660464442000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19828245 (or 19828229 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 20660464442000 in words is "twenty trillion, six hundred sixty billion, four hundred sixty-four million, four hundred forty-two thousand".