18630143 has 6 divisors (see below), whose sum is σ = 21671856. Its totient is φ = 15968652.

The previous prime is 18630121. The next prime is 18630169. The reversal of 18630143 is 34103681.

It is not a de Polignac number, because 18630143 - 2⁸ = 18629887 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 (18632143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 190055 + ... + 190152.

It is an arithmetic number, because the mean of its divisors is an integer number (3611976).

Almost surely, 2^18630143 is an apocalyptic number.

18630143 is a deficient number, since it is larger than the sum of its proper divisors (3041713).

18630143 is an equidigital number, since it uses as much as digits as its factorization.

18630143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380221 (or 380214 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 18630143 is about 4316.2649362614. The cubic root of 18630143 is about 265.0973559460.

The spelling of 18630143 in words is "eighteen million, six hundred thirty thousand, one hundred forty-three".