18349530 has 32 divisors (see below), whose sum is σ = 44181504. Its totient is φ = 4877376.

The previous prime is 18349481. The next prime is 18349549. The reversal of 18349530 is 3594381.

It is a junction number, because it is equal to n+sod(n) for n = 18349491 and 18349500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10692 + ... + 12288.

It is an arithmetic number, because the mean of its divisors is an integer number (1380672).

Almost surely, 2^18349530 is an apocalyptic number.

18349530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18349530 is an abundant number, since it is smaller than the sum of its proper divisors (25831974).

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

18349530 is a wasteful number, since it uses less digits than its factorization.

18349530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 18349530 is about 4283.6351385243. The cubic root of 18349530 is about 263.7596239460.

The spelling of 18349530 in words is "eighteen million, three hundred forty-nine thousand, five hundred thirty".