18993064712 has 32 divisors (see below), whose sum is σ = 35840047320. Its totient is φ = 9435847680.

The previous prime is 18993064711. The next prime is 18993064759. The reversal of 18993064712 is 21746039981.

It can be written as a sum of positive squares in 4 ways, for example, as 17975837476 + 1017227236 = 134074^2 + 31894^2 .

It is not an unprimeable number, because it can be changed into a prime (18993064711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1248512 + ... + 1263632.

Almost surely, 2^18993064712 is an apocalyptic number.

It is an amenable number.

18993064712 is a deficient number, since it is larger than the sum of its proper divisors (16846982608).

18993064712 is a wasteful number, since it uses less digits than its factorization.

18993064712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16121 (or 16117 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 18993064712 in words is "eighteen billion, nine hundred ninety-three million, sixty-four thousand, seven hundred twelve".