18805547450943 has 12 divisors (see below), whose sum is σ = 29632983862248. Its totient is φ = 11397301485360.

The previous prime is 18805547450939. The next prime is 18805547451037. The reversal of 18805547450943 is 34905474550881.

It is a happy number.

18805547450943 is a `hidden beast` number, since 1 + 8 + 8 + 0 + 5 + 54 + 74 + 509 + 4 + 3 = 666.

It is not a de Polignac number, because 18805547450943 - 2² = 18805547450939 is a prime.

It is a super-2 number, since 2×18805547450943² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18805547450903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94977512280 + ... + 94977512477.

It is an arithmetic number, because the mean of its divisors is an integer number (2469415321854).

Almost surely, 2^{18805547450943} is an apocalyptic number.

18805547450943 is a deficient number, since it is larger than the sum of its proper divisors (10827436411305).

18805547450943 is a wasteful number, since it uses less digits than its factorization.

18805547450943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189955024774 (or 189955024771 counting only the distinct ones).

The product of its (nonzero) digits is 96768000, while the sum is 63.

The spelling of 18805547450943 in words is "eighteen trillion, eight hundred five billion, five hundred forty-seven million, four hundred fifty thousand, nine hundred forty-three".