18996143 has 8 divisors (see below), whose sum is σ = 20050800. Its totient is φ = 17947008.

The previous prime is 18996097. The next prime is 18996151. The reversal of 18996143 is 34169981.

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

It is a cyclic number.

It is not a de Polignac number, because 18996143 - 2⁸ = 18995887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18996143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18996163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7073 + ... + 9381.

It is an arithmetic number, because the mean of its divisors is an integer number (2506350).

Almost surely, 2^18996143 is an apocalyptic number.

18996143 is a deficient number, since it is larger than the sum of its proper divisors (1054657).

18996143 is a wasteful number, since it uses less digits than its factorization.

18996143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761.

The product of its digits is 46656, while the sum is 41.

The square root of 18996143 is about 4358.4564928424. The cubic root of 18996143 is about 266.8221074658.

The spelling of 18996143 in words is "eighteen million, nine hundred ninety-six thousand, one hundred forty-three".