18843305943 has 32 divisors (see below), whose sum is σ = 32170544640. Its totient is φ = 9524165760.

The previous prime is 18843305939. The next prime is 18843305951. The reversal of 18843305943 is 34950334881.

It is not a de Polignac number, because 18843305943 - 2² = 18843305939 is a prime.

It is a super-2 number, since 2×18843305943² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18843305892 and 18843305901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18843305983) 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 31 ways as a sum of consecutive naturals, for example, 1093788 + ... + 1110881.

It is an arithmetic number, because the mean of its divisors is an integer number (1005329520).

Almost surely, 2^18843305943 is an apocalyptic number.

18843305943 is a deficient number, since it is larger than the sum of its proper divisors (13327238697).

18843305943 is a wasteful number, since it uses less digits than its factorization.

18843305943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204727.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 18843305943 in words is "eighteen billion, eight hundred forty-three million, three hundred five thousand, nine hundred forty-three".