18271446142 has 4 divisors (see below), whose sum is σ = 27407169216. Its totient is φ = 9135723070.

The previous prime is 18271446139. The next prime is 18271446187. The reversal of 18271446142 is 24164417281.

It is a happy number.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18271446095 and 18271446104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4567861534 + ... + 4567861537.

It is an arithmetic number, because the mean of its divisors is an integer number (6851792304).

Almost surely, 2^18271446142 is an apocalyptic number.

18271446142 is a deficient number, since it is larger than the sum of its proper divisors (9135723074).

18271446142 is an equidigital number, since it uses as much as digits as its factorization.

18271446142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9135723073.

The product of its digits is 86016, while the sum is 40.

The spelling of 18271446142 in words is "eighteen billion, two hundred seventy-one million, four hundred forty-six thousand, one hundred forty-two".