18001942 has 8 divisors (see below), whose sum is σ = 30860496. Its totient is φ = 7715112.

The previous prime is 18001931. The next prime is 18001961. The reversal of 18001942 is 24910081.

It is a happy number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642913 + ... + 642940.

It is an arithmetic number, because the mean of its divisors is an integer number (3857562).

Almost surely, 2^18001942 is an apocalyptic number.

18001942 is a deficient number, since it is larger than the sum of its proper divisors (12858554).

18001942 is a wasteful number, since it uses less digits than its factorization.

18001942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285862.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 18001942 is about 4242.8695478414. The cubic root of 18001942 is about 262.0835640445.

The spelling of 18001942 in words is "eighteen million, one thousand, nine hundred forty-two".