18540130 has 48 divisors (see below), whose sum is σ = 39230136. Its totient is φ = 6289920.

The previous prime is 18540127. The next prime is 18540131. The reversal of 18540130 is 3104581.

It can be written as a sum of positive squares in 4 ways, for example, as 15202201 + 3337929 = 3899^2 + 1827^2 .

It is not an unprimeable number, because it can be changed into a prime (18540131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76810 + ... + 77050.

Almost surely, 2^18540130 is an apocalyptic number.

18540130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18540130 is an abundant number, since it is smaller than the sum of its proper divisors (20690006).

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

18540130 is a wasteful number, since it uses less digits than its factorization.

18540130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18540130 is about 4305.8251241777. The cubic root of 18540130 is about 264.6697202501.

The spelling of 18540130 in words is "eighteen million, five hundred forty thousand, one hundred thirty".