18733998000857 has 2 divisors, whose sum is σ = 18733998000858. Its totient is φ = 18733998000856.

The previous prime is 18733998000833. The next prime is 18733998000961. The reversal of 18733998000857 is 75800089933781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14338786382281 + 4395211618576 = 3786659^2 + 2096476^2 .

It is a cyclic number.

It is not a de Polignac number, because 18733998000857 - 2¹⁰ = 18733997999833 is a prime.

It is a super-2 number, since 2×18733998000857² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18733998003857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9366999000428 + 9366999000429.

It is an arithmetic number, because the mean of its divisors is an integer number (9366999000429).

Almost surely, 2^{18733998000857} is an apocalyptic number.

It is an amenable number.

18733998000857 is a deficient number, since it is larger than the sum of its proper divisors (1).

18733998000857 is an equidigital number, since it uses as much as digits as its factorization.

18733998000857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91445760, while the sum is 68.

The spelling of 18733998000857 in words is "eighteen trillion, seven hundred thirty-three billion, nine hundred ninety-eight million, eight hundred fifty-seven", and thus it is an aban number.