18870234 has 16 divisors (see below), whose sum is σ = 38115360. Its totient is φ = 6227600.

The previous prime is 18870233. The next prime is 18870239. The reversal of 18870234 is 43207881.

It is a junction number, because it is equal to n+sod(n) for n = 18870195 and 18870204.

It is not an unprimeable number, because it can be changed into a prime (18870233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14964 + ... + 16175.

It is an arithmetic number, because the mean of its divisors is an integer number (2382210).

Almost surely, 2^18870234 is an apocalyptic number.

18870234 is an abundant number, since it is smaller than the sum of its proper divisors (19245126).

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

18870234 is a wasteful number, since it uses less digits than its factorization.

18870234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31245.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 18870234 is about 4343.9882596526. The cubic root of 18870234 is about 266.2312892139.

The spelling of 18870234 in words is "eighteen million, eight hundred seventy thousand, two hundred thirty-four".