18320347694 has 16 divisors (see below), whose sum is σ = 31556580480. Its totient is φ = 7889144760.

The previous prime is 18320347663. The next prime is 18320347699. The reversal of 18320347694 is 49674302381.

It is a super-2 number, since 2×18320347694² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18320347699) 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 7 ways as a sum of consecutive naturals, for example, 21913874 + ... + 21914709.

It is an arithmetic number, because the mean of its divisors is an integer number (1972286280).

Almost surely, 2^18320347694 is an apocalyptic number.

18320347694 is a deficient number, since it is larger than the sum of its proper divisors (13236232786).

18320347694 is a wasteful number, since it uses less digits than its factorization.

18320347694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43828615.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 18320347694 in words is "eighteen billion, three hundred twenty million, three hundred forty-seven thousand, six hundred ninety-four".