18103130 has 32 divisors (see below), whose sum is σ = 34945344. Its totient is φ = 6727936.

The previous prime is 18103123. The next prime is 18103133. The reversal of 18103130 is 3130181.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 18103099 and 18103108.

It is not an unprimeable number, because it can be changed into a prime (18103133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13469 + ... + 14751.

It is an arithmetic number, because the mean of its divisors is an integer number (1092042).

Almost surely, 2^18103130 is an apocalyptic number.

18103130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18103130 is a deficient number, since it is larger than the sum of its proper divisors (16842214).

18103130 is a wasteful number, since it uses less digits than its factorization.

18103130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 18103130 is about 4254.7773149720. Note that the first 3 decimals coincide. The cubic root of 18103130 is about 262.5736996387.

The spelling of 18103130 in words is "eighteen million, one hundred three thousand, one hundred thirty".