18191130751 has 4 divisors (see below), whose sum is σ = 18191421472. Its totient is φ = 18190840032.

The previous prime is 18191130743. The next prime is 18191130761. The reversal of 18191130751 is 15703119181.

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 18191130751 - 2³ = 18191130743 is a prime.

It is the 134875-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18191130751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18191130761) by changing a digit.

It is a nontrivial repunit in base 134874.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8631 + ... + 190936.

It is an arithmetic number, because the mean of its divisors is an integer number (4547855368).

Almost surely, 2^18191130751 is an apocalyptic number.

18191130751 is a deficient number, since it is larger than the sum of its proper divisors (290721).

18191130751 is an equidigital number, since it uses as much as digits as its factorization.

18191130751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290720.

The product of its (nonzero) digits is 7560, while the sum is 37.

The spelling of 18191130751 in words is "eighteen billion, one hundred ninety-one million, one hundred thirty thousand, seven hundred fifty-one".