18197243295 has 128 divisors (see below), whose sum is σ = 36931534848. Its totient is φ = 7432128000.

The previous prime is 18197243291. The next prime is 18197243297. The reversal of 18197243295 is 59234279181.

It is not a de Polignac number, because 18197243295 - 2² = 18197243291 is a prime.

It is a super-2 number, since 2×18197243295² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18197243291) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17963209 + ... + 17964221.

It is an arithmetic number, because the mean of its divisors is an integer number (288527616).

Almost surely, 2^18197243295 is an apocalyptic number.

18197243295 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18197243295 is an abundant number, since it is smaller than the sum of its proper divisors (18734291553).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18197243295 is a wasteful number, since it uses less digits than its factorization.

18197243295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293.

The product of its digits is 1088640, while the sum is 51.

The spelling of 18197243295 in words is "eighteen billion, one hundred ninety-seven million, two hundred forty-three thousand, two hundred ninety-five".