18055874399 has 2 divisors, whose sum is σ = 18055874400. Its totient is φ = 18055874398.

The previous prime is 18055874357. The next prime is 18055874429. The reversal of 18055874399 is 99347855081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18055874399 - 2²⁴ = 18039097183 is a prime.

It is a super-2 number, since 2×18055874399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18055874699) 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, 9027937199 + 9027937200.

It is an arithmetic number, because the mean of its divisors is an integer number (9027937200).

Almost surely, 2^18055874399 is an apocalyptic number.

18055874399 is a deficient number, since it is larger than the sum of its proper divisors (1).

18055874399 is an equidigital number, since it uses as much as digits as its factorization.

18055874399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 18055874399 in words is "eighteen billion, fifty-five million, eight hundred seventy-four thousand, three hundred ninety-nine".