19404423 has 12 divisors (see below), whose sum is σ = 28307448. Its totient is φ = 12807600.

The previous prime is 19404409. The next prime is 19404443. The reversal of 19404423 is 32440491.

It is not a de Polignac number, because 19404423 - 2⁸ = 19404167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19404443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9765 + ... + 11582.

It is an arithmetic number, because the mean of its divisors is an integer number (2358954).

Almost surely, 2^19404423 is an apocalyptic number.

19404423 is a deficient number, since it is larger than the sum of its proper divisors (8903025).

19404423 is a wasteful number, since it uses less digits than its factorization.

19404423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21454 (or 21451 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 19404423 is about 4405.0451757048. The cubic root of 19404423 is about 268.7201569170.

The spelling of 19404423 in words is "nineteen million, four hundred four thousand, four hundred twenty-three".