18818130 has 16 divisors (see below), whose sum is σ = 45163584. Its totient is φ = 5018160.

The previous prime is 18818119. The next prime is 18818131. The reversal of 18818130 is 3181881.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 627271 = 18818130 / (1 + 8 + 8 + 1 + 8 + 1 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (18818131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313606 + ... + 313665.

It is an arithmetic number, because the mean of its divisors is an integer number (2822724).

Almost surely, 2^18818130 is an apocalyptic number.

18818130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18818130 is an abundant number, since it is smaller than the sum of its proper divisors (26345454).

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

18818130 is a wasteful number, since it uses less digits than its factorization.

18818130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627281.

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 18818130 is about 4337.9868602844. The cubic root of 18818130 is about 265.9860263638.

It can be divided in two parts, 1881 and 8130, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 18818130 in words is "eighteen million, eight hundred eighteen thousand, one hundred thirty".