19906591764992 has 40 divisors (see below), whose sum is σ = 42113968396236. Its totient is φ = 9367807885312.

The previous prime is 19906591764973. The next prime is 19906591765001. The reversal of 19906591764992 is 29946719560991.

It can be written as a sum of positive squares in 2 ways, for example, as 19781999708416 + 124592056576 = 4447696^2 + 352976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143522533 + ... + 1143539940.

Almost surely, 2^{19906591764992} is an apocalyptic number.

It is an amenable number.

19906591764992 is an abundant number, since it is smaller than the sum of its proper divisors (22207376631244).

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

19906591764992 is an equidigital number, since it uses as much as digits as its factorization.

19906591764992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287062508 (or 2287062492 counting only the distinct ones).

The product of its (nonzero) digits is 595213920, while the sum is 77.

The spelling of 19906591764992 in words is "nineteen trillion, nine hundred six billion, five hundred ninety-one million, seven hundred sixty-four thousand, nine hundred ninety-two".