18130722231317 has 4 divisors (see below), whose sum is σ = 18132328579296. Its totient is φ = 18129115883340.

The previous prime is 18130722231313. The next prime is 18130722231341. The reversal of 18130722231317 is 71313222703181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18130722231317 - 2² = 18130722231313 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130722231313) 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, 803157059 + ... + 803179632.

It is an arithmetic number, because the mean of its divisors is an integer number (4533082144824).

Almost surely, 2^{18130722231317} is an apocalyptic number.

It is an amenable number.

18130722231317 is a deficient number, since it is larger than the sum of its proper divisors (1606347979).

18130722231317 is a wasteful number, since it uses less digits than its factorization.

18130722231317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606347978.

The product of its (nonzero) digits is 84672, while the sum is 41.

Adding to 18130722231317 its reverse (71313222703181), we get a palindrome (89443944934498).

The spelling of 18130722231317 in words is "eighteen trillion, one hundred thirty billion, seven hundred twenty-two million, two hundred thirty-one thousand, three hundred seventeen".