18445084668 has 24 divisors (see below), whose sum is σ = 47820590160. Its totient is φ = 6148361520.

The previous prime is 18445084667. The next prime is 18445084739. The reversal of 18445084668 is 86648054481.

It is a happy number.

18445084668 is a `hidden beast` number, since 184 + 450 + 8 + 4 + 6 + 6 + 8 = 666.

It is a super-2 number, since 2×18445084668² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18445084667) 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, 85393803 + ... + 85394018.

It is an arithmetic number, because the mean of its divisors is an integer number (1992524590).

Almost surely, 2^18445084668 is an apocalyptic number.

18445084668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18445084668 is an abundant number, since it is smaller than the sum of its proper divisors (29375505492).

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

18445084668 is a wasteful number, since it uses less digits than its factorization.

18445084668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170787834 (or 170787826 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 18445084668 in words is "eighteen billion, four hundred forty-five million, eighty-four thousand, six hundred sixty-eight".