19421323 has 2 divisors, whose sum is σ = 19421324. Its totient is φ = 19421322.

The previous prime is 19421239. The next prime is 19421341. The reversal of 19421323 is 32312491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19421323 - 2²¹ = 17324171 is a prime.

It is not a weakly prime, because it can be changed into another prime (19421383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9710661 + 9710662.

It is an arithmetic number, because the mean of its divisors is an integer number (9710662).

Almost surely, 2^19421323 is an apocalyptic number.

19421323 is a deficient number, since it is larger than the sum of its proper divisors (1).

19421323 is an equidigital number, since it uses as much as digits as its factorization.

19421323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 19421323 is about 4406.9630132326. The cubic root of 19421323 is about 268.7981469174.

The spelling of 19421323 in words is "nineteen million, four hundred twenty-one thousand, three hundred twenty-three".