18318823151 has 2 divisors, whose sum is σ = 18318823152. Its totient is φ = 18318823150.

The previous prime is 18318823139. The next prime is 18318823177. The reversal of 18318823151 is 15132881381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18318823151 - 2²² = 18314628847 is a prime.

It is a super-2 number, since 2×18318823151² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18318823099 and 18318823108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18318823111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159411575 + 9159411576.

It is an arithmetic number, because the mean of its divisors is an integer number (9159411576).

Almost surely, 2^18318823151 is an apocalyptic number.

18318823151 is a deficient number, since it is larger than the sum of its proper divisors (1).

18318823151 is an equidigital number, since it uses as much as digits as its factorization.

18318823151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 41.

The spelling of 18318823151 in words is "eighteen billion, three hundred eighteen million, eight hundred twenty-three thousand, one hundred fifty-one".