18122420259 has 6 divisors (see below), whose sum is σ = 26176829276. Its totient is φ = 12081613500.

The previous prime is 18122420237. The next prime is 18122420287. The reversal of 18122420259 is 95202422181.

18122420259 is a `hidden beast` number, since 181 + 2 + 2 + 420 + 2 + 59 = 666.

It is not a de Polignac number, because 18122420259 - 2⁵ = 18122420227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18122420159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1006801117 + ... + 1006801134.

Almost surely, 2^18122420259 is an apocalyptic number.

18122420259 is a deficient number, since it is larger than the sum of its proper divisors (8054409017).

18122420259 is a wasteful number, since it uses less digits than its factorization.

18122420259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013602257 (or 2013602254 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 18122420259 in words is "eighteen billion, one hundred twenty-two million, four hundred twenty thousand, two hundred fifty-nine".