18349330 has 16 divisors (see below), whose sum is σ = 33448320. Its totient is φ = 7246512.

The previous prime is 18349327. The next prime is 18349333. The reversal of 18349330 is 3394381.

It is an interprime number because it is at equal distance from previous prime (18349327) and next prime (18349333).

It is a super-2 number, since 2×18349330² = 673395822897800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18349292 and 18349301.

It is not an unprimeable number, because it can be changed into a prime (18349333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10824 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (2090520).

Almost surely, 2^18349330 is an apocalyptic number.

18349330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18349330 is a deficient number, since it is larger than the sum of its proper divisors (15098990).

18349330 is a wasteful number, since it uses less digits than its factorization.

18349330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23313.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 18349330 is about 4283.6117938020. The cubic root of 18349330 is about 263.7586656632.

The spelling of 18349330 in words is "eighteen million, three hundred forty-nine thousand, three hundred thirty".