18388435345 has 16 divisors (see below), whose sum is σ = 25304509440. Its totient is φ = 12566170944.

The previous prime is 18388435319. The next prime is 18388435349. The reversal of 18388435345 is 54353488381.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18388435345 - 2¹³ = 18388427153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18388435292 and 18388435301.

It is not an unprimeable number, because it can be changed into a prime (18388435349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886305 + ... + 906814.

It is an arithmetic number, because the mean of its divisors is an integer number (1581531840).

Almost surely, 2^18388435345 is an apocalyptic number.

It is an amenable number.

18388435345 is a deficient number, since it is larger than the sum of its proper divisors (6916074095).

18388435345 is a wasteful number, since it uses less digits than its factorization.

18388435345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793424.

The product of its digits is 5529600, while the sum is 52.

The spelling of 18388435345 in words is "eighteen billion, three hundred eighty-eight million, four hundred thirty-five thousand, three hundred forty-five".