18125830 has 16 divisors (see below), whose sum is σ = 32736384. Its totient is φ = 7225920.

The previous prime is 18125801. The next prime is 18125831. The reversal of 18125830 is 3852181.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18125831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235 + ... + 6025.

It is an arithmetic number, because the mean of its divisors is an integer number (2046024).

Almost surely, 2^18125830 is an apocalyptic number.

18125830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18125830 is a deficient number, since it is larger than the sum of its proper divisors (14610554).

18125830 is a wasteful number, since it uses less digits than its factorization.

18125830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6111.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18125830 is about 4257.4440689221. Note that the first 3 decimals coincide. The cubic root of 18125830 is about 262.6834031983.

The spelling of 18125830 in words is "eighteen million, one hundred twenty-five thousand, eight hundred thirty".