18642918586 has 16 divisors (see below), whose sum is σ = 28170825408. Its totient is φ = 9252896800.

The previous prime is 18642918583. The next prime is 18642918643. The reversal of 18642918586 is 68581924681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18642918586.

It is not an unprimeable number, because it can be changed into a prime (18642918583) 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, 84741 + ... + 210871.

It is an arithmetic number, because the mean of its divisors is an integer number (1760676588).

Almost surely, 2^18642918586 is an apocalyptic number.

18642918586 is a deficient number, since it is larger than the sum of its proper divisors (9527906822).

18642918586 is a wasteful number, since it uses less digits than its factorization.

18642918586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126677.

The product of its digits is 6635520, while the sum is 58.

The spelling of 18642918586 in words is "eighteen billion, six hundred forty-two million, nine hundred eighteen thousand, five hundred eighty-six".