18618571142 has 4 divisors (see below), whose sum is σ = 27927856716. Its totient is φ = 9309285570.

The previous prime is 18618571129. The next prime is 18618571163. The reversal of 18618571142 is 24117581681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24117581681 = 54319 ⋅443999.

It is a junction number, because it is equal to n+sod(n) for n = 18618571093 and 18618571102.

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, 4654642784 + ... + 4654642787.

It is an arithmetic number, because the mean of its divisors is an integer number (6981964179).

Almost surely, 2^18618571142 is an apocalyptic number.

18618571142 is a deficient number, since it is larger than the sum of its proper divisors (9309285574).

18618571142 is an equidigital number, since it uses as much as digits as its factorization.

18618571142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9309285573.

The product of its digits is 107520, while the sum is 44.

The spelling of 18618571142 in words is "eighteen billion, six hundred eighteen million, five hundred seventy-one thousand, one hundred forty-two".