18220098 has 16 divisors (see below), whose sum is σ = 39243456. Its totient is φ = 5606160.

The previous prime is 18220093. The next prime is 18220099. The reversal of 18220098 is 89002281.

It is a super-2 number, since 2×18220098² = 663943942259208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18220093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116718 + ... + 116873.

It is an arithmetic number, because the mean of its divisors is an integer number (2452716).

Almost surely, 2^18220098 is an apocalyptic number.

18220098 is an abundant number, since it is smaller than the sum of its proper divisors (21023358).

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

18220098 is a wasteful number, since it uses less digits than its factorization.

18220098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233609.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18220098 is about 4268.5006735387. The cubic root of 18220098 is about 263.1380000272.

It can be divided in two parts, 18 and 220098, that added together give a triangular number (220116 = T₆₆₃).

The spelling of 18220098 in words is "eighteen million, two hundred twenty thousand, ninety-eight".