18274442 has 16 divisors (see below), whose sum is σ = 27911520. Its totient is φ = 8972112.

The previous prime is 18274433. The next prime is 18274463. The reversal of 18274442 is 24447281.

It is a super-2 number, since 2×18274442² = 667910460822728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18274399 and 18274408.

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 7 ways as a sum of consecutive naturals, for example, 46784 + ... + 47172.

It is an arithmetic number, because the mean of its divisors is an integer number (1744470).

Almost surely, 2^18274442 is an apocalyptic number.

18274442 is a deficient number, since it is larger than the sum of its proper divisors (9637078).

18274442 is a wasteful number, since it uses less digits than its factorization.

18274442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

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

The square root of 18274442 is about 4274.8616351877. The cubic root of 18274442 is about 263.3993556972.

The spelling of 18274442 in words is "eighteen million, two hundred seventy-four thousand, four hundred forty-two".