18427442 has 8 divisors (see below), whose sum is σ = 30154032. Its totient is φ = 8376100.

The previous prime is 18427427. The next prime is 18427477. The reversal of 18427442 is 24472481.

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

It is a junction number, because it is equal to n+sod(n) for n = 18427399 and 18427408.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 418784 + ... + 418827.

It is an arithmetic number, because the mean of its divisors is an integer number (3769254).

Almost surely, 2^18427442 is an apocalyptic number.

18427442 is a deficient number, since it is larger than the sum of its proper divisors (11726590).

18427442 is a wasteful number, since it uses less digits than its factorization.

18427442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837624.

The product of its digits is 14336, while the sum is 32.

The square root of 18427442 is about 4292.7196507575. The cubic root of 18427442 is about 264.1324041229.

The spelling of 18427442 in words is "eighteen million, four hundred twenty-seven thousand, four hundred forty-two".