19776223 has 2 divisors, whose sum is σ = 19776224. Its totient is φ = 19776222.

The previous prime is 19776221. The next prime is 19776247. The reversal of 19776223 is 32267791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19776223 - 2¹ = 19776221 is a prime.

It is a super-2 number, since 2×19776223² = 782197992291458, which contains 22 as substring.

Together with 19776221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19776221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9888111 + 9888112.

It is an arithmetic number, because the mean of its divisors is an integer number (9888112).

Almost surely, 2^19776223 is an apocalyptic number.

19776223 is a deficient number, since it is larger than the sum of its proper divisors (1).

19776223 is an equidigital number, since it uses as much as digits as its factorization.

19776223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 19776223 is about 4447.0465479911. The cubic root of 19776223 is about 270.4255885285.

The spelling of 19776223 in words is "nineteen million, seven hundred seventy-six thousand, two hundred twenty-three".