19923223 has 2 divisors, whose sum is σ = 19923224. Its totient is φ = 19923222.

The previous prime is 19923193. The next prime is 19923227. The reversal of 19923223 is 32232991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19923223 - 2²¹ = 17826071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19923227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9961611 + 9961612.

It is an arithmetic number, because the mean of its divisors is an integer number (9961612).

Almost surely, 2^19923223 is an apocalyptic number.

19923223 is a deficient number, since it is larger than the sum of its proper divisors (1).

19923223 is an equidigital number, since it uses as much as digits as its factorization.

19923223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 19923223 is about 4463.5437714892. The cubic root of 19923223 is about 271.0939748431.

The spelling of 19923223 in words is "nineteen million, nine hundred twenty-three thousand, two hundred twenty-three".