19816765364 has 24 divisors (see below), whose sum is σ = 37853882976. Its totient is φ = 9002412000.

The previous prime is 19816765363. The next prime is 19816765399. The reversal of 19816765364 is 46356761891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19816765363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52742 + ... + 205949.

It is an arithmetic number, because the mean of its divisors is an integer number (1577245124).

Almost surely, 2^19816765364 is an apocalyptic number.

It is an amenable number.

19816765364 is a deficient number, since it is larger than the sum of its proper divisors (18037117612).

19816765364 is a wasteful number, since it uses less digits than its factorization.

19816765364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260447 (or 260445 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The spelling of 19816765364 in words is "nineteen billion, eight hundred sixteen million, seven hundred sixty-five thousand, three hundred sixty-four".