18142471387 has 4 divisors (see below), whose sum is σ = 18142827120. Its totient is φ = 18142115656.

The previous prime is 18142471381. The next prime is 18142471429. The reversal of 18142471387 is 78317424181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18142471387 is a prime.

It is a super-4 number, since 4×18142471387⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18142471381) 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, 85312 + ... + 208717.

It is an arithmetic number, because the mean of its divisors is an integer number (4535706780).

Almost surely, 2^18142471387 is an apocalyptic number.

18142471387 is a deficient number, since it is larger than the sum of its proper divisors (355733).

18142471387 is an equidigital number, since it uses as much as digits as its factorization.

18142471387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355732.

The product of its digits is 301056, while the sum is 46.

The spelling of 18142471387 in words is "eighteen billion, one hundred forty-two million, four hundred seventy-one thousand, three hundred eighty-seven".