18331102 has 4 divisors (see below), whose sum is σ = 27496656. Its totient is φ = 9165550.

The previous prime is 18331099. The next prime is 18331109. The reversal of 18331102 is 20113381.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18331102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18331109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4582774 + ... + 4582777.

It is an arithmetic number, because the mean of its divisors is an integer number (6874164).

Almost surely, 2^18331102 is an apocalyptic number.

18331102 is a deficient number, since it is larger than the sum of its proper divisors (9165554).

18331102 is an equidigital number, since it uses as much as digits as its factorization.

18331102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9165553.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 18331102 is about 4281.4836213630. The cubic root of 18331102 is about 263.6712985161.

Adding to 18331102 its reverse (20113381), we get a palindrome (38444483).

The spelling of 18331102 in words is "eighteen million, three hundred thirty-one thousand, one hundred two".