18799974769 has 9 divisors (see below), whose sum is σ = 19430381529. Its totient is φ = 18189410580.

The previous prime is 18799974749. The next prime is 18799974839. The reversal of 18799974769 is 96747999781.

The square root of 18799974769 is 137113.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 18799974769 - 2⁵ = 18799974737 is a prime.

It is a super-2 number, since 2×18799974769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18799974695 and 18799974704.

It is not an unprimeable number, because it can be changed into a prime (18799974749) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4248292 + ... + 4252714.

It is an arithmetic number, because the mean of its divisors is an integer number (2158931281).

Almost surely, 2^18799974769 is an apocalyptic number.

18799974769 is the 137113-rd square number.

18799974769 is the 68557-th centered octagonal number.

It is an amenable number.

18799974769 is a deficient number, since it is larger than the sum of its proper divisors (630406760).

18799974769 is an frugal number, since it uses more digits than its factorization.

18799974769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8908 (or 4454 counting only the distinct ones).

The product of its digits is 432081216, while the sum is 76.

The spelling of 18799974769 in words is "eighteen billion, seven hundred ninety-nine million, nine hundred seventy-four thousand, seven hundred sixty-nine".