18666862143 has 4 divisors (see below), whose sum is σ = 24889149528. Its totient is φ = 12444574760.

The previous prime is 18666862141. The next prime is 18666862157. The reversal of 18666862143 is 34126866681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18666862143 - 2¹ = 18666862141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18666862141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111143688 + ... + 3111143693.

It is an arithmetic number, because the mean of its divisors is an integer number (6222287382).

Almost surely, 2^18666862143 is an apocalyptic number.

18666862143 is a deficient number, since it is larger than the sum of its proper divisors (6222287385).

18666862143 is an equidigital number, since it uses as much as digits as its factorization.

18666862143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222287384.

The product of its digits is 1990656, while the sum is 51.

The spelling of 18666862143 in words is "eighteen billion, six hundred sixty-six million, eight hundred sixty-two thousand, one hundred forty-three".