18541426149 has 32 divisors (see below), whose sum is σ = 28872426240. Its totient is φ = 11737161216.

The previous prime is 18541426093. The next prime is 18541426231. The reversal of 18541426149 is 94162414581.

18541426149 is a `hidden beast` number, since 1 + 8 + 541 + 4 + 2 + 61 + 49 = 666.

It is not a de Polignac number, because 18541426149 - 2²⁰ = 18540377573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18541226149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23892 + ... + 194045.

It is an arithmetic number, because the mean of its divisors is an integer number (902263320).

Almost surely, 2^18541426149 is an apocalyptic number.

It is an amenable number.

18541426149 is a deficient number, since it is larger than the sum of its proper divisors (10331000091).

18541426149 is a wasteful number, since it uses less digits than its factorization.

18541426149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218106 (or 218100 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 18541426149 in words is "eighteen billion, five hundred forty-one million, four hundred twenty-six thousand, one hundred forty-nine".