18001142 has 16 divisors (see below), whose sum is σ = 28032000. Its totient is φ = 8660520.

The previous prime is 18001121. The next prime is 18001153. The reversal of 18001142 is 24110081.

It is a super-2 number, since 2×18001142² = 648082226608328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18001142.

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 7 ways as a sum of consecutive naturals, for example, 11609 + ... + 13067.

It is an arithmetic number, because the mean of its divisors is an integer number (1752000).

Almost surely, 2^18001142 is an apocalyptic number.

18001142 is a deficient number, since it is larger than the sum of its proper divisors (10030858).

18001142 is a wasteful number, since it uses less digits than its factorization.

18001142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 18001142 is about 4242.7752709754. The cubic root of 18001142 is about 262.0796816864.

The spelling of 18001142 in words is "eighteen million, one thousand, one hundred forty-two".