18274736193 has 128 divisors (see below), whose sum is σ = 30741258240. Its totient is φ = 9434880000.

The previous prime is 18274736191. The next prime is 18274736201. The reversal of 18274736193 is 39163747281.

It is a happy number.

It is not a de Polignac number, because 18274736193 - 2¹ = 18274736191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18274736191) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 121024668 + ... + 121024818.

It is an arithmetic number, because the mean of its divisors is an integer number (240166080).

Almost surely, 2^18274736193 is an apocalyptic number.

It is an amenable number.

18274736193 is a deficient number, since it is larger than the sum of its proper divisors (12466522047).

18274736193 is a wasteful number, since it uses less digits than its factorization.

18274736193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its digits is 1524096, while the sum is 51.

The spelling of 18274736193 in words is "eighteen billion, two hundred seventy-four million, seven hundred thirty-six thousand, one hundred ninety-three".