18300131443 has 4 divisors (see below), whose sum is σ = 19963779768. Its totient is φ = 16636483120.

The previous prime is 18300131387. The next prime is 18300131449. The reversal of 18300131443 is 34413100381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34413100381 = 11 ⋅3128463671.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18300131443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18300131449) 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, 831824146 + ... + 831824167.

It is an arithmetic number, because the mean of its divisors is an integer number (4990944942).

Almost surely, 2^18300131443 is an apocalyptic number.

18300131443 is a deficient number, since it is larger than the sum of its proper divisors (1663648325).

18300131443 is a wasteful number, since it uses less digits than its factorization.

18300131443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663648324.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 18300131443 in words is "eighteen billion, three hundred million, one hundred thirty-one thousand, four hundred forty-three".