18968596993 has 2 divisors, whose sum is σ = 18968596994. Its totient is φ = 18968596992.

The previous prime is 18968596981. The next prime is 18968597023. The reversal of 18968596993 is 39969586981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16917684624 + 2050912369 = 130068^2 + 45287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18968596993 is a prime.

It is not a weakly prime, because it can be changed into another prime (18968593993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484298496 + 9484298497.

It is an arithmetic number, because the mean of its divisors is an integer number (9484298497).

Almost surely, 2^18968596993 is an apocalyptic number.

It is an amenable number.

18968596993 is a deficient number, since it is larger than the sum of its proper divisors (1).

18968596993 is an equidigital number, since it uses as much as digits as its factorization.

18968596993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226748160, while the sum is 73.

The spelling of 18968596993 in words is "eighteen billion, nine hundred sixty-eight million, five hundred ninety-six thousand, nine hundred ninety-three".