19321427 has 2 divisors, whose sum is σ = 19321428. Its totient is φ = 19321426.

The previous prime is 19321411. The next prime is 19321429. The reversal of 19321427 is 72412391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19321427 - 2⁴ = 19321411 is a prime.

Together with 19321429, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19321427.

It is not a weakly prime, because it can be changed into another prime (19321429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9660713 + 9660714.

It is an arithmetic number, because the mean of its divisors is an integer number (9660714).

Almost surely, 2^19321427 is an apocalyptic number.

19321427 is a deficient number, since it is larger than the sum of its proper divisors (1).

19321427 is an equidigital number, since it uses as much as digits as its factorization.

19321427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 19321427 is about 4395.6145190405. The cubic root of 19321427 is about 268.3364888672.

The spelling of 19321427 in words is "nineteen million, three hundred twenty-one thousand, four hundred twenty-seven".