18381254769 has 48 divisors (see below), whose sum is σ = 27927244800. Its totient is φ = 11639672928.

The previous prime is 18381254761. The next prime is 18381254779. The reversal of 18381254769 is 96745218381.

18381254769 is a `hidden beast` number, since 1 + 8 + 38 + 1 + 2 + 547 + 69 = 666.

It is not a de Polignac number, because 18381254769 - 2³ = 18381254761 is a prime.

It is a super-2 number, since 2×18381254769² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18381254761) 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 47 ways as a sum of consecutive naturals, for example, 1966942 + ... + 1976264.

It is an arithmetic number, because the mean of its divisors is an integer number (581817600).

Almost surely, 2^18381254769 is an apocalyptic number.

It is an amenable number.

18381254769 is a deficient number, since it is larger than the sum of its proper divisors (9545990031).

18381254769 is a wasteful number, since it uses less digits than its factorization.

18381254769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514 (or 9511 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 18381254769 in words is "eighteen billion, three hundred eighty-one million, two hundred fifty-four thousand, seven hundred sixty-nine".