18430074 has 96 divisors (see below), whose sum is σ = 47056464. Its totient is φ = 5160960.

The previous prime is 18430043. The next prime is 18430079. The reversal of 18430074 is 47003481.

It can be written as a sum of positive squares in 8 ways, for example, as 308025 + 18122049 = 555^2 + 4257^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18430079) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163042 + ... + 163154.

Almost surely, 2^18430074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18430074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23528232).

18430074 is an abundant number, since it is smaller than the sum of its proper divisors (28626390).

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

18430074 is a wasteful number, since it uses less digits than its factorization.

18430074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18430074 is about 4293.0262053708. The cubic root of 18430074 is about 264.1449789084.

The spelling of 18430074 in words is "eighteen million, four hundred thirty thousand, seventy-four".