19426423 has 2 divisors, whose sum is σ = 19426424. Its totient is φ = 19426422.

The previous prime is 19426409. The next prime is 19426439. The reversal of 19426423 is 32462491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19426423 - 2⁵ = 19426391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19426453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9713211 + 9713212.

It is an arithmetic number, because the mean of its divisors is an integer number (9713212).

Almost surely, 2^19426423 is an apocalyptic number.

19426423 is a deficient number, since it is larger than the sum of its proper divisors (1).

19426423 is an equidigital number, since it uses as much as digits as its factorization.

19426423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 19426423 is about 4407.5416050220. The cubic root of 19426423 is about 268.8216734741.

The spelling of 19426423 in words is "nineteen million, four hundred twenty-six thousand, four hundred twenty-three".