18081242618 has 8 divisors (see below), whose sum is σ = 27123385248. Its totient is φ = 9040114204.

The previous prime is 18081242617. The next prime is 18081242671. The reversal of 18081242618 is 81624218081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18081242618² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18081242617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207296 + ... + 281307.

It is an arithmetic number, because the mean of its divisors is an integer number (3390423156).

Almost surely, 2^18081242618 is an apocalyptic number.

18081242618 is a deficient number, since it is larger than the sum of its proper divisors (9042142630).

18081242618 is a wasteful number, since it uses less digits than its factorization.

18081242618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507108.

The product of its (nonzero) digits is 49152, while the sum is 41.

The spelling of 18081242618 in words is "eighteen billion, eighty-one million, two hundred forty-two thousand, six hundred eighteen".