18362417172 has 96 divisors (see below), whose sum is σ = 48838809600. Its totient is φ = 5315249280.

The previous prime is 18362417119. The next prime is 18362417189. The reversal of 18362417172 is 27171426381.

It is a congruent number.

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, 2494954 + ... + 2502302.

It is an arithmetic number, because the mean of its divisors is an integer number (508737600).

Almost surely, 2^18362417172 is an apocalyptic number.

18362417172 is a gapful number since it is divisible by the number (12) 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 18362417172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24419404800).

18362417172 is an abundant number, since it is smaller than the sum of its proper divisors (30476392428).

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

18362417172 is a wasteful number, since it uses less digits than its factorization.

18362417172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8213 (or 8211 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

It can be divided in two parts, 18362 and 417172, that added together give a palindrome (435534).

The spelling of 18362417172 in words is "eighteen billion, three hundred sixty-two million, four hundred seventeen thousand, one hundred seventy-two".