19208968768 has 42 divisors (see below), whose sum is σ = 41898091718. Its totient is φ = 8731345920.

The previous prime is 19208968703. The next prime is 19208968771. The reversal of 19208968768 is 86786980291.

It can be written as a sum of positive squares in only one way, i.e., 14302246464 + 4906722304 = 119592^2 + 70048^2 .

It is a super-2 number, since 2×19208968768² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1232505 + ... + 1247992.

Almost surely, 2^19208968768 is an apocalyptic number.

It is an amenable number.

19208968768 is an abundant number, since it is smaller than the sum of its proper divisors (22689122950).

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

19208968768 is a wasteful number, since it uses less digits than its factorization.

19208968768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480531 (or 2480510 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 64.

The spelling of 19208968768 in words is "nineteen billion, two hundred eight million, nine hundred sixty-eight thousand, seven hundred sixty-eight".