18222130 has 32 divisors (see below), whose sum is σ = 35680176. Its totient is φ = 6672384.

The previous prime is 18222119. The next prime is 18222137. The reversal of 18222130 is 3122281.

It can be written as a sum of positive squares in 8 ways, for example, as 10621081 + 7601049 = 3259^2 + 2757^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18222098 and 18222107.

It is not an unprimeable number, because it can be changed into a prime (18222137) 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, 4842 + ... + 7738.

Almost surely, 2^18222130 is an apocalyptic number.

18222130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18222130 is a deficient number, since it is larger than the sum of its proper divisors (17458046).

18222130 is a wasteful number, since it uses less digits than its factorization.

18222130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 18222130 is about 4268.7386895897. The cubic root of 18222130 is about 263.1477818359.

The spelling of 18222130 in words is "eighteen million, two hundred twenty-two thousand, one hundred thirty".