19531423 has 2 divisors, whose sum is σ = 19531424. Its totient is φ = 19531422.

The previous prime is 19531409. The next prime is 19531433. The reversal of 19531423 is 32413591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19531423 - 2⁹ = 19530911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19531391 and 19531400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19531403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9765711 + 9765712.

It is an arithmetic number, because the mean of its divisors is an integer number (9765712).

Almost surely, 2^19531423 is an apocalyptic number.

19531423 is a deficient number, since it is larger than the sum of its proper divisors (1).

19531423 is an equidigital number, since it uses as much as digits as its factorization.

19531423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 19531423 is about 4419.4369550883. The cubic root of 19531423 is about 269.3051313817.

The spelling of 19531423 in words is "nineteen million, five hundred thirty-one thousand, four hundred twenty-three".