18351939788323 has 2 divisors, whose sum is σ = 18351939788324. Its totient is φ = 18351939788322.

The previous prime is 18351939788291. The next prime is 18351939788327. The reversal of 18351939788323 is 32388793915381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18351939788323 - 2⁵ = 18351939788291 is a prime.

It is not a weakly prime, because it can be changed into another prime (18351939788327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175969894161 + 9175969894162.

It is an arithmetic number, because the mean of its divisors is an integer number (9175969894162).

Almost surely, 2^{18351939788323} is an apocalyptic number.

18351939788323 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351939788323 is an equidigital number, since it uses as much as digits as its factorization.

18351939788323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235146240, while the sum is 70.

The spelling of 18351939788323 in words is "eighteen trillion, three hundred fifty-one billion, nine hundred thirty-nine million, seven hundred eighty-eight thousand, three hundred twenty-three".