18295797881 has 8 divisors (see below), whose sum is σ = 18550222824. Its totient is φ = 18042716160.

The previous prime is 18295797859. The next prime is 18295797929. The reversal of 18295797881 is 18879759281.

It can be written as a sum of positive squares in 4 ways, for example, as 4059728656 + 14236069225 = 63716^2 + 119315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18295797881 - 2¹⁸ = 18295535737 is a prime.

It is a super-2 number, since 2×18295797881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18295797181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308360 + ... + 362873.

It is an arithmetic number, because the mean of its divisors is an integer number (2318777853).

Almost surely, 2^18295797881 is an apocalyptic number.

It is an amenable number.

18295797881 is a deficient number, since it is larger than the sum of its proper divisors (254424943).

18295797881 is an equidigital number, since it uses as much as digits as its factorization.

18295797881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671611.

The product of its digits is 20321280, while the sum is 65.

The spelling of 18295797881 in words is "eighteen billion, two hundred ninety-five million, seven hundred ninety-seven thousand, eight hundred eighty-one".