19976512464 has 40 divisors (see below), whose sum is σ = 57339990720. Its totient is φ = 6658837344.

The previous prime is 19976512447. The next prime is 19976512547. The reversal of 19976512464 is 46421567991.

19976512464 is a `hidden beast` number, since 19 + 9 + 76 + 512 + 46 + 4 = 666.

It is a super-2 number, since 2×19976512464² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19976512464.

It is a congruent number.

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, 23120532 + ... + 23121395.

It is an arithmetic number, because the mean of its divisors is an integer number (1433499768).

Almost surely, 2^19976512464 is an apocalyptic number.

It is an amenable number.

19976512464 is an abundant number, since it is smaller than the sum of its proper divisors (37363478256).

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

19976512464 is a wasteful number, since it uses less digits than its factorization.

19976512464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46241944 (or 46241932 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 19976512464 in words is "nineteen billion, nine hundred seventy-six million, five hundred twelve thousand, four hundred sixty-four".