19621166316 has 24 divisors (see below), whose sum is σ = 48192338880. Its totient is φ = 6196157712.

The previous prime is 19621166309. The next prime is 19621166329. The reversal of 19621166316 is 61366112691.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43028646 + ... + 43029101.

It is an arithmetic number, because the mean of its divisors is an integer number (2008014120).

Almost surely, 2^19621166316 is an apocalyptic number.

It is an amenable number.

19621166316 is an abundant number, since it is smaller than the sum of its proper divisors (28571172564).

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

19621166316 is a wasteful number, since it uses less digits than its factorization.

19621166316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86057773 (or 86057771 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The spelling of 19621166316 in words is "nineteen billion, six hundred twenty-one million, one hundred sixty-six thousand, three hundred sixteen".