19008423 has 18 divisors (see below), whose sum is σ = 31940064. Its totient is φ = 10861704.

The previous prime is 19008403. The next prime is 19008449. The reversal of 19008423 is 32480091.

It is not a de Polignac number, because 19008423 - 2⁵ = 19008391 is a prime.

It is a super-2 number, since 2×19008423² = 722640289893858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19008403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21111 + ... + 21992.

It is an arithmetic number, because the mean of its divisors is an integer number (1774448).

Almost surely, 2^19008423 is an apocalyptic number.

19008423 is a deficient number, since it is larger than the sum of its proper divisors (12931641).

19008423 is a wasteful number, since it uses less digits than its factorization.

19008423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43123 (or 43113 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 19008423 is about 4359.8650208464. The cubic root of 19008423 is about 266.8795905329.

Subtracting from 19008423 its product of nonzero digits (1728), we obtain a triangular number (19006695 = T₆₁₆₅).

The spelling of 19008423 in words is "nineteen million, eight thousand, four hundred twenty-three".