18429730 has 16 divisors (see below), whose sum is σ = 36189504. Its totient is φ = 6701680.

The previous prime is 18429721. The next prime is 18429731. The reversal of 18429730 is 3792481.

It is not an unprimeable number, because it can be changed into a prime (18429731) 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 7 ways as a sum of consecutive naturals, for example, 83662 + ... + 83881.

It is an arithmetic number, because the mean of its divisors is an integer number (2261844).

Almost surely, 2^18429730 is an apocalyptic number.

18429730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18429730 is a deficient number, since it is larger than the sum of its proper divisors (17759774).

18429730 is a wasteful number, since it uses less digits than its factorization.

18429730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167561.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 18429730 is about 4292.9861402059. The cubic root of 18429730 is about 264.1433354634.

The spelling of 18429730 in words is "eighteen million, four hundred twenty-nine thousand, seven hundred thirty".