18537421324 has 12 divisors (see below), whose sum is σ = 32498112024. Its totient is φ = 9252246464.

The previous prime is 18537421321. The next prime is 18537421349. The reversal of 18537421324 is 42312473581.

It is not an unprimeable number, because it can be changed into a prime (18537421321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4113517 + ... + 4118020.

It is an arithmetic number, because the mean of its divisors is an integer number (2708176002).

Almost surely, 2^18537421324 is an apocalyptic number.

It is an amenable number.

18537421324 is a deficient number, since it is larger than the sum of its proper divisors (13960690700).

18537421324 is a wasteful number, since it uses less digits than its factorization.

18537421324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8232104 (or 8232102 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The spelling of 18537421324 in words is "eighteen billion, five hundred thirty-seven million, four hundred twenty-one thousand, three hundred twenty-four".