18295805405 has 18 divisors (see below), whose sum is σ = 22134628314. Its totient is φ = 14517840000.

The previous prime is 18295805371. The next prime is 18295805417. The reversal of 18295805405 is 50450859281.

It can be written as a sum of positive squares in 3 ways, for example, as 5594740804 + 12701064601 = 74798^2 + 112699^2 .

It is not a de Polignac number, because 18295805405 - 2¹⁰ = 18295804381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18295805405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 72891530 + ... + 72891780.

It is an arithmetic number, because the mean of its divisors is an integer number (1229701573).

Almost surely, 2^18295805405 is an apocalyptic number.

It is an amenable number.

18295805405 is a deficient number, since it is larger than the sum of its proper divisors (3838822909).

18295805405 is an frugal number, since it uses more digits than its factorization.

18295805405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 47.

The spelling of 18295805405 in words is "eighteen billion, two hundred ninety-five million, eight hundred five thousand, four hundred five".