18455130 has 72 divisors (see below), whose sum is σ = 49575708. Its totient is φ = 4762368.

The previous prime is 18455093. The next prime is 18455159. The reversal of 18455130 is 3155481.

18455130 is a `hidden beast` number, since 1 + 84 + 551 + 30 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 12680721 + 5774409 = 3561^2 + 2403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18455094 and 18455103.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 252774 + ... + 252846.

Almost surely, 2^18455130 is an apocalyptic number.

18455130 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 18455130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24787854).

18455130 is an abundant number, since it is smaller than the sum of its proper divisors (31120578).

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

18455130 is a wasteful number, since it uses less digits than its factorization.

18455130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 18455130 is about 4295.9434353818. The cubic root of 18455130 is about 264.2646279048.

The spelling of 18455130 in words is "eighteen million, four hundred fifty-five thousand, one hundred thirty".