18318128076972 has 48 divisors (see below), whose sum is σ = 47540052897120. Its totient is φ = 6099792869376.

The previous prime is 18318128076967. The next prime is 18318128077003. The reversal of 18318128076972 is 27967082181381.

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, 86697093 + ... + 86908124.

It is an arithmetic number, because the mean of its divisors is an integer number (990417768690).

Almost surely, 2^{18318128076972} is an apocalyptic number.

18318128076972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18318128076972 is an abundant number, since it is smaller than the sum of its proper divisors (29221924820148).

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

18318128076972 is a wasteful number, since it uses less digits than its factorization.

18318128076972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173606207 (or 173606199 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 63.

The spelling of 18318128076972 in words is "eighteen trillion, three hundred eighteen billion, one hundred twenty-eight million, seventy-six thousand, nine hundred seventy-two".