18696844345 has 16 divisors (see below), whose sum is σ = 22844734272. Its totient is φ = 14686004160.

The previous prime is 18696844343. The next prime is 18696844391. The reversal of 18696844345 is 54344869681.

It is not a de Polignac number, because 18696844345 - 2¹ = 18696844343 is a prime.

It is a super-2 number, since 2×18696844345² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18696844345.

It is not an unprimeable number, because it can be changed into a prime (18696844343) 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, 117274 + ... + 226156.

It is an arithmetic number, because the mean of its divisors is an integer number (1427795892).

Almost surely, 2^18696844345 is an apocalyptic number.

It is an amenable number.

18696844345 is a deficient number, since it is larger than the sum of its proper divisors (4147889927).

18696844345 is a wasteful number, since it uses less digits than its factorization.

18696844345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109512.

The product of its digits is 19906560, while the sum is 58.

It can be divided in two parts, 18696 and 844345, that added together give a square (863041 = 929²).

The spelling of 18696844345 in words is "eighteen billion, six hundred ninety-six million, eight hundred forty-four thousand, three hundred forty-five".