18963223 has 4 divisors (see below), whose sum is σ = 18973008. Its totient is φ = 18953440.

The previous prime is 18963221. The next prime is 18963229. The reversal of 18963223 is 32236981.

It is a happy number.

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 18963223 - 2¹ = 18963221 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 (18963221) 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, 898 + ... + 6223.

It is an arithmetic number, because the mean of its divisors is an integer number (4743252).

Almost surely, 2^18963223 is an apocalyptic number.

18963223 is a deficient number, since it is larger than the sum of its proper divisors (9785).

18963223 is an equidigital number, since it uses as much as digits as its factorization.

18963223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9784.

The product of its digits is 15552, while the sum is 34.

The square root of 18963223 is about 4354.6782889210. The cubic root of 18963223 is about 266.6678855847.

The spelling of 18963223 in words is "eighteen million, nine hundred sixty-three thousand, two hundred twenty-three".