18228130 has 16 divisors (see below), whose sum is σ = 33574464. Its totient is φ = 7121520.

The previous prime is 18228083. The next prime is 18228157. The reversal of 18228130 is 3182281.

It is a junction number, because it is equal to n+sod(n) for n = 18228095 and 18228104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20766 + ... + 21625.

It is an arithmetic number, because the mean of its divisors is an integer number (2098404).

Almost surely, 2^18228130 is an apocalyptic number.

18228130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18228130 is a deficient number, since it is larger than the sum of its proper divisors (15346334).

18228130 is a wasteful number, since it uses less digits than its factorization.

18228130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42441.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18228130 is about 4269.4414154547. The cubic root of 18228130 is about 263.1766608863.

The spelling of 18228130 in words is "eighteen million, two hundred twenty-eight thousand, one hundred thirty".