18313985143 has 8 divisors (see below), whose sum is σ = 18504091008. Its totient is φ = 18124116024.

The previous prime is 18313985119. The next prime is 18313985147. The reversal of 18313985143 is 34158931381.

It is a happy number.

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 18313985143 - 2⁵ = 18313985111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18313985093 and 18313985102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18313985147) 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, 98496 + ... + 215242.

It is an arithmetic number, because the mean of its divisors is an integer number (2313011376).

Almost surely, 2^18313985143 is an apocalyptic number.

18313985143 is a deficient number, since it is larger than the sum of its proper divisors (190105865).

18313985143 is a wasteful number, since it uses less digits than its factorization.

18313985143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118373.

The product of its digits is 311040, while the sum is 46.

The spelling of 18313985143 in words is "eighteen billion, three hundred thirteen million, nine hundred eighty-five thousand, one hundred forty-three".