18550043 has 6 divisors (see below), whose sum is σ = 19705716. Its totient is φ = 17458592.

The previous prime is 18550033. The next prime is 18550067. The reversal of 18550043 is 34005581.

It is not a de Polignac number, because 18550043 - 2²⁰ = 17501467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18549994 and 18550021.

It is not an unprimeable number, because it can be changed into a prime (18550033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31805 + ... + 32382.

It is an arithmetic number, because the mean of its divisors is an integer number (3284286).

Almost surely, 2^18550043 is an apocalyptic number.

18550043 is a deficient number, since it is larger than the sum of its proper divisors (1155673).

18550043 is an equidigital number, since it uses as much as digits as its factorization.

18550043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64221 (or 64204 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 18550043 is about 4306.9760853759. The cubic root of 18550043 is about 264.7168828728.

The spelling of 18550043 in words is "eighteen million, five hundred fifty thousand, forty-three".