18458447506868 has 12 divisors (see below), whose sum is σ = 33416154969540. Its totient is φ = 8910974658432.

The previous prime is 18458447506757. The next prime is 18458447506871. The reversal of 18458447506868 is 86860574485481.

It can be written as a sum of positive squares in 2 ways, for example, as 10952009221924 + 7506438284944 = 3309382^2 + 2739788^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18458447506795 and 18458447506804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79562273621 + ... + 79562273852.

It is an arithmetic number, because the mean of its divisors is an integer number (2784679580795).

Almost surely, 2^{18458447506868} is an apocalyptic number.

It is an amenable number.

18458447506868 is a deficient number, since it is larger than the sum of its proper divisors (14957707462672).

18458447506868 is a wasteful number, since it uses less digits than its factorization.

18458447506868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159124547506 (or 159124547504 counting only the distinct ones).

The product of its (nonzero) digits is 1651507200, while the sum is 74.

The spelling of 18458447506868 in words is "eighteen trillion, four hundred fifty-eight billion, four hundred forty-seven million, five hundred six thousand, eight hundred sixty-eight".