18009315771 has 16 divisors (see below), whose sum is σ = 24585627264. Its totient is φ = 11719943424.

The previous prime is 18009315761. The next prime is 18009315791. The reversal of 18009315771 is 17751390081.

It is a happy number.

It is not a de Polignac number, because 18009315771 - 2⁶ = 18009315707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18009315761) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 177780 + ... + 260046.

It is an arithmetic number, because the mean of its divisors is an integer number (1536601704).

Almost surely, 2^18009315771 is an apocalyptic number.

18009315771 is a deficient number, since it is larger than the sum of its proper divisors (6576311493).

18009315771 is a wasteful number, since it uses less digits than its factorization.

18009315771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84010.

The product of its (nonzero) digits is 52920, while the sum is 42.

The spelling of 18009315771 in words is "eighteen billion, nine million, three hundred fifteen thousand, seven hundred seventy-one".