19920787116 has 48 divisors (see below), whose sum is σ = 48456403968. Its totient is φ = 6362424000.

The previous prime is 19920787099. The next prime is 19920787181. The reversal of 19920787116 is 61178702991.

It is a happy 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, 227530 + ... + 302673.

It is an arithmetic number, because the mean of its divisors is an integer number (1009508416).

Almost surely, 2^19920787116 is an apocalyptic number.

It is an amenable number.

19920787116 is an abundant number, since it is smaller than the sum of its proper divisors (28535616852).

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

19920787116 is a wasteful number, since it uses less digits than its factorization.

19920787116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530342 (or 530340 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 51.

The spelling of 19920787116 in words is "nineteen billion, nine hundred twenty million, seven hundred eighty-seven thousand, one hundred sixteen".