18213095597 has 4 divisors (see below), whose sum is σ = 18248054076. Its totient is φ = 18178137120.

The previous prime is 18213095587. The next prime is 18213095611. The reversal of 18213095597 is 79559031281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79559031281 = 101 ⋅787713181.

It can be written as a sum of positive squares in 2 ways, for example, as 8016337156 + 10196758441 = 89534^2 + 100979^2 .

It is a cyclic number.

It is not a de Polignac number, because 18213095597 - 2¹⁰ = 18213094573 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 (18213095567) 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, 17478458 + ... + 17479499.

It is an arithmetic number, because the mean of its divisors is an integer number (4562013519).

Almost surely, 2^18213095597 is an apocalyptic number.

It is an amenable number.

18213095597 is a deficient number, since it is larger than the sum of its proper divisors (34958479).

18213095597 is an equidigital number, since it uses as much as digits as its factorization.

18213095597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34958478.

The product of its (nonzero) digits is 680400, while the sum is 50.

The spelling of 18213095597 in words is "eighteen billion, two hundred thirteen million, ninety-five thousand, five hundred ninety-seven".