19513190768 has 10 divisors (see below), whose sum is σ = 37806807144. Its totient is φ = 9756595376.

The previous prime is 19513190743. The next prime is 19513190813. The reversal of 19513190768 is 86709131591.

It is a super-2 number, since 2×19513190768² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609787196 + ... + 609787227.

Almost surely, 2^19513190768 is an apocalyptic number.

It is an amenable number.

19513190768 is a deficient number, since it is larger than the sum of its proper divisors (18293616376).

19513190768 is a wasteful number, since it uses less digits than its factorization.

19513190768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219574431 (or 1219574425 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The spelling of 19513190768 in words is "nineteen billion, five hundred thirteen million, one hundred ninety thousand, seven hundred sixty-eight".