18204307693 has 24 divisors (see below), whose sum is σ = 22769392896. Its totient is φ = 14377708800.

The previous prime is 18204307643. The next prime is 18204307703. The reversal of 18204307693 is 39670340281.

It is a de Polignac number, because none of the positive numbers 2^k-18204307693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18204307603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256413 + ... + 319618.

It is an arithmetic number, because the mean of its divisors is an integer number (948724704).

Almost surely, 2^18204307693 is an apocalyptic number.

18204307693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18204307693 is a deficient number, since it is larger than the sum of its proper divisors (4565085203).

18204307693 is a wasteful number, since it uses less digits than its factorization.

18204307693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576085 (or 576072 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 18204307693 in words is "eighteen billion, two hundred four million, three hundred seven thousand, six hundred ninety-three".