18299338 has 16 divisors (see below), whose sum is σ = 28211040. Its totient is φ = 8897616.

The previous prime is 18299321. The next prime is 18299339. The reversal of 18299338 is 83399281.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 18299294 and 18299303.

It is not an unprimeable number, because it can be changed into a prime (18299339) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33181 + ... + 33727.

It is an arithmetic number, because the mean of its divisors is an integer number (1763190).

Almost surely, 2^18299338 is an apocalyptic number.

18299338 is a deficient number, since it is larger than the sum of its proper divisors (9911702).

18299338 is a wasteful number, since it uses less digits than its factorization.

18299338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its digits is 93312, while the sum is 43.

The square root of 18299338 is about 4277.7725512234. The cubic root of 18299338 is about 263.5189145639.

The spelling of 18299338 in words is "eighteen million, two hundred ninety-nine thousand, three hundred thirty-eight".