18205181419 has 2 divisors, whose sum is σ = 18205181420. Its totient is φ = 18205181418.

The previous prime is 18205181413. The next prime is 18205181437. The reversal of 18205181419 is 91418150281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18205181419 - 2¹⁵ = 18205148651 is a prime.

It is a super-2 number, since 2×18205181419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18205181413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9102590709 + 9102590710.

It is an arithmetic number, because the mean of its divisors is an integer number (9102590710).

Almost surely, 2^18205181419 is an apocalyptic number.

18205181419 is a deficient number, since it is larger than the sum of its proper divisors (1).

18205181419 is an equidigital number, since it uses as much as digits as its factorization.

18205181419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 40.

The spelling of 18205181419 in words is "eighteen billion, two hundred five million, one hundred eighty-one thousand, four hundred nineteen".