18227090 has 16 divisors (see below), whose sum is σ = 37495872. Its totient is φ = 6249264.

The previous prime is 18227087. The next prime is 18227093. The reversal of 18227090 is 9072281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18227087) and next prime (18227093).

It is not an unprimeable number, because it can be changed into a prime (18227093) 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, 130124 + ... + 130263.

It is an arithmetic number, because the mean of its divisors is an integer number (2343492).

Almost surely, 2^18227090 is an apocalyptic number.

18227090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18227090 is an abundant number, since it is smaller than the sum of its proper divisors (19268782).

18227090 is a wasteful number, since it uses less digits than its factorization.

18227090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260401.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18227090 is about 4269.3196179251. The cubic root of 18227090 is about 263.1716556383.

It can be divided in two parts, 182 and 27090, that added together give a palindrome (27272).

The spelling of 18227090 in words is "eighteen million, two hundred twenty-seven thousand, ninety".