18685226874 has 16 divisors (see below), whose sum is σ = 38575952640. Its totient is φ = 6027492480.

The previous prime is 18685226873. The next prime is 18685226909. The reversal of 18685226874 is 47862258681.

It is not an unprimeable number, because it can be changed into a prime (18685226873) 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, 50228919 + ... + 50229290.

It is an arithmetic number, because the mean of its divisors is an integer number (2410997040).

Almost surely, 2^18685226874 is an apocalyptic number.

18685226874 is an abundant number, since it is smaller than the sum of its proper divisors (19890725766).

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

18685226874 is a wasteful number, since it uses less digits than its factorization.

18685226874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100458245.

The product of its digits is 10321920, while the sum is 57.

The spelling of 18685226874 in words is "eighteen billion, six hundred eighty-five million, two hundred twenty-six thousand, eight hundred seventy-four".