19016923 has 2 divisors, whose sum is σ = 19016924. Its totient is φ = 19016922.

The previous prime is 19016911. The next prime is 19016951. The reversal of 19016923 is 32961091.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19016923 is a prime.

It is not a weakly prime, because it can be changed into another prime (19010923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9508461 + 9508462.

It is an arithmetic number, because the mean of its divisors is an integer number (9508462).

Almost surely, 2^19016923 is an apocalyptic number.

19016923 is a deficient number, since it is larger than the sum of its proper divisors (1).

19016923 is an equidigital number, since it uses as much as digits as its factorization.

19016923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 19016923 is about 4360.8397127159. The cubic root of 19016923 is about 266.9193648033.

The spelling of 19016923 in words is "nineteen million, sixteen thousand, nine hundred twenty-three".