18189314426 has 16 divisors (see below), whose sum is σ = 27372945600. Its totient is φ = 9065023968.

The previous prime is 18189314399. The next prime is 18189314447. The reversal of 18189314426 is 62441398181.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1954781 + ... + 1964063.

It is an arithmetic number, because the mean of its divisors is an integer number (1710809100).

Almost surely, 2^18189314426 is an apocalyptic number.

18189314426 is a deficient number, since it is larger than the sum of its proper divisors (9183631174).

18189314426 is a wasteful number, since it uses less digits than its factorization.

18189314426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12373.

The product of its digits is 331776, while the sum is 47.

The spelling of 18189314426 in words is "eighteen billion, one hundred eighty-nine million, three hundred fourteen thousand, four hundred twenty-six".