18469744158 has 16 divisors (see below), whose sum is σ = 36944848656. Its totient is φ = 6155688000.

The previous prime is 18469744157. The next prime is 18469744177. The reversal of 18469744158 is 85144796481.

It is a super-2 number, since 2×18469744158² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18469744098 and 18469744107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18469744157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177841 + ... + 261852.

It is an arithmetic number, because the mean of its divisors is an integer number (2309053041).

Almost surely, 2^18469744158 is an apocalyptic number.

18469744158 is an abundant number, since it is smaller than the sum of its proper divisors (18475104498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18469744158 is a wasteful number, since it uses less digits than its factorization.

18469744158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446699.

The product of its digits is 7741440, while the sum is 57.

The spelling of 18469744158 in words is "eighteen billion, four hundred sixty-nine million, seven hundred forty-four thousand, one hundred fifty-eight".