18345943 has 24 divisors (see below), whose sum is σ = 23581584. Its totient is φ = 14112000.

The previous prime is 18345931. The next prime is 18345949. The reversal of 18345943 is 34954381.

It is not a de Polignac number, because 18345943 - 2⁵ = 18345911 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 (18345949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54271 + ... + 54607.

It is an arithmetic number, because the mean of its divisors is an integer number (982566).

Almost surely, 2^18345943 is an apocalyptic number.

18345943 is a deficient number, since it is larger than the sum of its proper divisors (5235641).

18345943 is a wasteful number, since it uses less digits than its factorization.

18345943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 456 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 18345943 is about 4283.2164316084. The cubic root of 18345943 is about 263.7424360865.

It can be divided in two parts, 1834 and 5943, that added together give a palindrome (7777).

The spelling of 18345943 in words is "eighteen million, three hundred forty-five thousand, nine hundred forty-three".