18543373134 has 64 divisors (see below), whose sum is σ = 43711170048. Its totient is φ = 5170204800.

The previous prime is 18543373129. The next prime is 18543373141. The reversal of 18543373134 is 43137334581.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232092 + ... + 301584.

It is an arithmetic number, because the mean of its divisors is an integer number (682987032).

Almost surely, 2^18543373134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18543373134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21855585024).

18543373134 is an abundant number, since it is smaller than the sum of its proper divisors (25167796914).

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

18543373134 is a wasteful number, since it uses less digits than its factorization.

18543373134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69833.

The product of its digits is 362880, while the sum is 42.

The spelling of 18543373134 in words is "eighteen billion, five hundred forty-three million, three hundred seventy-three thousand, one hundred thirty-four".