18430442 has 8 divisors (see below), whose sum is σ = 27690336. Its totient is φ = 9200332.

The previous prime is 18430417. The next prime is 18430453. The reversal of 18430442 is 24403481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5828 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (3461292).

Almost surely, 2^18430442 is an apocalyptic number.

18430442 is a deficient number, since it is larger than the sum of its proper divisors (9259894).

18430442 is a wasteful number, since it uses less digits than its factorization.

18430442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14892.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 18430442 is about 4293.0690653657. The cubic root of 18430442 is about 264.1467369897.

The spelling of 18430442 in words is "eighteen million, four hundred thirty thousand, four hundred forty-two".