18229698 has 40 divisors (see below), whose sum is σ = 41207760. Its totient is φ = 6023160.

The previous prime is 18229691. The next prime is 18229709. The reversal of 18229698 is 89692281.

It is not an unprimeable number, because it can be changed into a prime (18229691) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20793 + ... + 21651.

It is an arithmetic number, because the mean of its divisors is an integer number (1030194).

Almost surely, 2^18229698 is an apocalyptic number.

18229698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18229698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20603880).

18229698 is an abundant number, since it is smaller than the sum of its proper divisors (22978062).

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

18229698 is a wasteful number, since it uses less digits than its factorization.

18229698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 995 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 18229698 is about 4269.6250420851. The cubic root of 18229698 is about 263.1842069003.

The spelling of 18229698 in words is "eighteen million, two hundred twenty-nine thousand, six hundred ninety-eight".