18088742709 has 12 divisors (see below), whose sum is σ = 26157002976. Its totient is φ = 12045860712.

The previous prime is 18088742701. The next prime is 18088742719. The reversal of 18088742709 is 90724788081.

It is a happy number.

It is not a de Polignac number, because 18088742709 - 2³ = 18088742701 is a prime.

It is a super-2 number, since 2×18088742709² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18088742701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1099809 + ... + 1116134.

It is an arithmetic number, because the mean of its divisors is an integer number (2179750248).

Almost surely, 2^18088742709 is an apocalyptic number.

It is an amenable number.

18088742709 is a deficient number, since it is larger than the sum of its proper divisors (8068260267).

18088742709 is a wasteful number, since it uses less digits than its factorization.

18088742709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216856 (or 2216853 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 18088742709 in words is "eighteen billion, eighty-eight million, seven hundred forty-two thousand, seven hundred nine".