18667942 has 8 divisors (see below), whose sum is σ = 28420056. Its totient is φ = 9194592.

The previous prime is 18667933. The next prime is 18667963. The reversal of 18667942 is 24976681.

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

It is a congruent number.

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, 69523 + ... + 69790.

It is an arithmetic number, because the mean of its divisors is an integer number (3552507).

Almost surely, 2^18667942 is an apocalyptic number.

18667942 is a deficient number, since it is larger than the sum of its proper divisors (9752114).

18667942 is a wasteful number, since it uses less digits than its factorization.

18667942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139382.

The product of its digits is 145152, while the sum is 43.

The square root of 18667942 is about 4320.6413875720. The cubic root of 18667942 is about 265.2765216082.

The spelling of 18667942 in words is "eighteen million, six hundred sixty-seven thousand, nine hundred forty-two".