18227100 has 36 divisors (see below), whose sum is σ = 52737944. Its totient is φ = 4860480.

The previous prime is 18227093. The next prime is 18227119. The reversal of 18227100 is 172281.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30079 + ... + 30678.

Almost surely, 2^18227100 is an apocalyptic number.

18227100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18227100 is an abundant number, since it is smaller than the sum of its proper divisors (34510844).

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

18227100 is a wasteful number, since it uses less digits than its factorization.

18227100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60774 (or 60767 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 18227100 is about 4269.3207890717. The cubic root of 18227100 is about 263.1717037666.

Adding to 18227100 its reverse (172281), we get a palindrome (18399381).

The spelling of 18227100 in words is "eighteen million, two hundred twenty-seven thousand, one hundred".