18628705343 has 4 divisors (see below), whose sum is σ = 18628984920. Its totient is φ = 18628425768.

The previous prime is 18628705289. The next prime is 18628705367. The reversal of 18628705343 is 34350782681.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34350782681 = 257 ⋅133660633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18628705343 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 (18628725343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24596 + ... + 194582.

It is an arithmetic number, because the mean of its divisors is an integer number (4657246230).

Almost surely, 2^18628705343 is an apocalyptic number.

18628705343 is a deficient number, since it is larger than the sum of its proper divisors (279577).

18628705343 is a wasteful number, since it uses less digits than its factorization.

18628705343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279576.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 18628705343 in words is "eighteen billion, six hundred twenty-eight million, seven hundred five thousand, three hundred forty-three".