18026943 has 24 divisors (see below), whose sum is σ = 26946864. Its totient is φ = 10707840.

The previous prime is 18026941. The next prime is 18026959. The reversal of 18026943 is 34962081.

It is not a de Polignac number, because 18026943 - 2¹ = 18026941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18026941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18771 + ... + 19707.

It is an arithmetic number, because the mean of its divisors is an integer number (1122786).

Almost surely, 2^18026943 is an apocalyptic number.

18026943 is a deficient number, since it is larger than the sum of its proper divisors (8919921).

18026943 is a wasteful number, since it uses less digits than its factorization.

18026943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 18026943 is about 4245.8147627988. The cubic root of 18026943 is about 262.2048346688.

The spelling of 18026943 in words is "eighteen million, twenty-six thousand, nine hundred forty-three".