18112487851 has 4 divisors (see below), whose sum is σ = 18142625704. Its totient is φ = 18082350000.

The previous prime is 18112487801. The next prime is 18112487867. The reversal of 18112487851 is 15878421181.

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

It is a cyclic number.

It is not a de Polignac number, because 18112487851 - 2⁹ = 18112487339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18112487801) 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, 15068025 + ... + 15069226.

It is an arithmetic number, because the mean of its divisors is an integer number (4535656426).

Almost surely, 2^18112487851 is an apocalyptic number.

18112487851 is a deficient number, since it is larger than the sum of its proper divisors (30137853).

18112487851 is an equidigital number, since it uses as much as digits as its factorization.

18112487851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30137852.

The product of its digits is 143360, while the sum is 46.

The spelling of 18112487851 in words is "eighteen billion, one hundred twelve million, four hundred eighty-seven thousand, eight hundred fifty-one".