18136340218 has 32 divisors (see below), whose sum is σ = 29886148800. Its totient is φ = 8221199616.

The previous prime is 18136340207. The next prime is 18136340239. The reversal of 18136340218 is 81204363181.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51705 + ... + 197347.

It is an arithmetic number, because the mean of its divisors is an integer number (933942150).

Almost surely, 2^18136340218 is an apocalyptic number.

18136340218 is a deficient number, since it is larger than the sum of its proper divisors (11749808582).

18136340218 is a wasteful number, since it uses less digits than its factorization.

18136340218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145806.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 18136340218 in words is "eighteen billion, one hundred thirty-six million, three hundred forty thousand, two hundred eighteen".