18451893056172 has 48 divisors (see below), whose sum is σ = 44074748965632. Its totient is φ = 6004993135680.

The previous prime is 18451893056117. The next prime is 18451893056197. The reversal of 18451893056172 is 27165039815481.

It is a happy number.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

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, 6544323 + ... + 8929274.

It is an arithmetic number, because the mean of its divisors is an integer number (918223936784).

It is a 1-persistent number, because it is pandigital, but 2⋅18451893056172 = 36903786112344 is not.

Almost surely, 2^{18451893056172} is an apocalyptic number.

18451893056172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18451893056172 is an abundant number, since it is smaller than the sum of its proper divisors (25622855909460).

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

18451893056172 is a wasteful number, since it uses less digits than its factorization.

18451893056172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15475958 (or 15475956 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 18451893056172 in words is "eighteen trillion, four hundred fifty-one billion, eight hundred ninety-three million, fifty-six thousand, one hundred seventy-two".