18429330 has 32 divisors (see below), whose sum is σ = 45428544. Its totient is φ = 4781376.

The previous prime is 18429317. The next prime is 18429337. The reversal of 18429330 is 3392481.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (18429337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7192 + ... + 9411.

It is an arithmetic number, because the mean of its divisors is an integer number (1419642).

Almost surely, 2^18429330 is an apocalyptic number.

18429330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18429330 is an abundant number, since it is smaller than the sum of its proper divisors (26999214).

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

18429330 is a wasteful number, since it uses less digits than its factorization.

18429330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16650.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 18429330 is about 4292.9395523347. The cubic root of 18429330 is about 264.1414244551.

The spelling of 18429330 in words is "eighteen million, four hundred twenty-nine thousand, three hundred thirty".