18548293149 has 24 divisors (see below), whose sum is σ = 27089316800. Its totient is φ = 12228496128.

The previous prime is 18548293133. The next prime is 18548293157. The reversal of 18548293149 is 94139284581.

It is a happy number.

18548293149 is a `hidden beast` number, since 1 + 8 + 548 + 2 + 93 + 1 + 4 + 9 = 666.

It is not a de Polignac number, because 18548293149 - 2⁴ = 18548293133 is a prime.

It is a super-4 number, since 4×18548293149⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18548293095 and 18548293104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18548293109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1213734 + ... + 1228920.

Almost surely, 2^18548293149 is an apocalyptic number.

It is an amenable number.

18548293149 is a deficient number, since it is larger than the sum of its proper divisors (8541023651).

18548293149 is a wasteful number, since it uses less digits than its factorization.

18548293149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16689 (or 16686 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

It can be divided in two parts, 185482 and 93149, that added together give a triangular number (278631 = T₇₄₆).

The spelling of 18548293149 in words is "eighteen billion, five hundred forty-eight million, two hundred ninety-three thousand, one hundred forty-nine".