18445043 has 4 divisors (see below), whose sum is σ = 18454320. Its totient is φ = 18435768.

The previous prime is 18445027. The next prime is 18445079. The reversal of 18445043 is 34054481.

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.

It is a cyclic number.

It is not a de Polignac number, because 18445043 - 2⁴ = 18445027 is a prime.

It is a super-2 number, since 2×18445043² = 680439222543698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18444997 and 18445015.

It is not an unprimeable number, because it can be changed into a prime (18445003) 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, 308 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (4613580).

Almost surely, 2^18445043 is an apocalyptic number.

18445043 is a deficient number, since it is larger than the sum of its proper divisors (9277).

18445043 is an equidigital number, since it uses as much as digits as its factorization.

18445043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9276.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 18445043 is about 4294.7692603911. The cubic root of 18445043 is about 264.2164728552.

The spelling of 18445043 in words is "eighteen million, four hundred forty-five thousand, forty-three".