18047663862564 has 96 divisors (see below), whose sum is σ = 49692205817856. Its totient is φ = 4988870346240.

The previous prime is 18047663862559. The next prime is 18047663862623. The reversal of 18047663862564 is 46526836674081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18047663862495 and 18047663862504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9400012 + ... + 11155964.

It is an arithmetic number, because the mean of its divisors is an integer number (517627143936).

Almost surely, 2^{18047663862564} is an apocalyptic number.

18047663862564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18047663862564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24846102908928).

18047663862564 is an abundant number, since it is smaller than the sum of its proper divisors (31644541955292).

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

18047663862564 is a wasteful number, since it uses less digits than its factorization.

18047663862564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759945 (or 1759943 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 66.

The spelling of 18047663862564 in words is "eighteen trillion, forty-seven billion, six hundred sixty-three million, eight hundred sixty-two thousand, five hundred sixty-four".