18464143 has 8 divisors (see below), whose sum is σ = 19476720. Its totient is φ = 17455680.

The previous prime is 18464141. The next prime is 18464153. The reversal of 18464143 is 34146481.

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

It is not a de Polignac number, because 18464143 - 2¹ = 18464141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18464141) 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, 13821 + ... + 15097.

It is an arithmetic number, because the mean of its divisors is an integer number (2434590).

Almost surely, 2^18464143 is an apocalyptic number.

18464143 is a deficient number, since it is larger than the sum of its proper divisors (1012577).

18464143 is a wasteful number, since it uses less digits than its factorization.

18464143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057.

The product of its digits is 9216, while the sum is 31.

The square root of 18464143 is about 4296.9923202165. The cubic root of 18464143 is about 264.3076408675.

The spelling of 18464143 in words is "eighteen million, four hundred sixty-four thousand, one hundred forty-three".