18993134274 has 16 divisors (see below), whose sum is σ = 39985546080. Its totient is φ = 5997831840.

The previous prime is 18993134273. The next prime is 18993134299. The reversal of 18993134274 is 47243139981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18993134273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83303107 + ... + 83303334.

It is an arithmetic number, because the mean of its divisors is an integer number (2499096630).

Almost surely, 2^18993134274 is an apocalyptic number.

18993134274 is an abundant number, since it is smaller than the sum of its proper divisors (20992411806).

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

18993134274 is a wasteful number, since it uses less digits than its factorization.

18993134274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166606465.

The product of its digits is 1306368, while the sum is 51.

The spelling of 18993134274 in words is "eighteen billion, nine hundred ninety-three million, one hundred thirty-four thousand, two hundred seventy-four".