18670370172 has 48 divisors (see below), whose sum is σ = 45142907040. Its totient is φ = 5998655488.

The previous prime is 18670370167. The next prime is 18670370219. The reversal of 18670370172 is 27107307681.

It is a happy number.

It is a congruent number.

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, 161128 + ... + 251600.

It is an arithmetic number, because the mean of its divisors is an integer number (940477230).

Almost surely, 2^18670370172 is an apocalyptic number.

18670370172 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 18670370172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22571453520).

18670370172 is an abundant number, since it is smaller than the sum of its proper divisors (26472536868).

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

18670370172 is a wasteful number, since it uses less digits than its factorization.

18670370172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91102 (or 91100 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The spelling of 18670370172 in words is "eighteen billion, six hundred seventy million, three hundred seventy thousand, one hundred seventy-two".