18000086441 has 4 divisors (see below), whose sum is σ = 18021042000. Its totient is φ = 17979130884.

The previous prime is 18000086399. The next prime is 18000086477. The reversal of 18000086441 is 14468000081.

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 a de Polignac number, because none of the positive numbers 2^k-18000086441 is a prime.

It is a super-2 number, since 2×18000086441² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18000086398 and 18000086407.

It is not an unprimeable number, because it can be changed into a prime (18000086141) 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, 10476491 + ... + 10478208.

It is an arithmetic number, because the mean of its divisors is an integer number (4505260500).

Almost surely, 2^18000086441 is an apocalyptic number.

It is an amenable number.

18000086441 is a deficient number, since it is larger than the sum of its proper divisors (20955559).

18000086441 is an equidigital number, since it uses as much as digits as its factorization.

18000086441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20955558.

The product of its (nonzero) digits is 6144, while the sum is 32.

The spelling of 18000086441 in words is "eighteen billion, eighty-six thousand, four hundred forty-one".