18434223 has 16 divisors (see below), whose sum is σ = 27650400. Its totient is φ = 12288024.

The previous prime is 18434209. The next prime is 18434249. The reversal of 18434223 is 32243481.

18434223 is a `hidden beast` number, since 1 + 8 + 434 + 223 = 666.

It is not a de Polignac number, because 18434223 - 2⁹ = 18433711 is a prime.

It is a super-2 number, since 2×18434223² = 679641155227458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18434203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2028 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (1728150).

Almost surely, 2^18434223 is an apocalyptic number.

18434223 is a deficient number, since it is larger than the sum of its proper divisors (9216177).

18434223 is an frugal number, since it uses more digits than its factorization.

18434223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8450 (or 8432 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 18434223 is about 4293.5094037396. The cubic root of 18434223 is about 264.1647989642.

The spelling of 18434223 in words is "eighteen million, four hundred thirty-four thousand, two hundred twenty-three".