18685370370 has 64 divisors (see below), whose sum is σ = 46196966016. Its totient is φ = 4833354240.

The previous prime is 18685370351. The next prime is 18685370383. The reversal of 18685370370 is 7307358681.

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, 341982 + ... + 392838.

It is an arithmetic number, because the mean of its divisors is an integer number (721827594).

Almost surely, 2^18685370370 is an apocalyptic number.

18685370370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18685370370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23098483008).

18685370370 is an abundant number, since it is smaller than the sum of its proper divisors (27511595646).

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

18685370370 is a wasteful number, since it uses less digits than its factorization.

18685370370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51235.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 18685370370 in words is "eighteen billion, six hundred eighty-five million, three hundred seventy thousand, three hundred seventy".