19995423 has 8 divisors (see below), whose sum is σ = 30469248. Its totient is φ = 11425944.

The previous prime is 19995421. The next prime is 19995427. The reversal of 19995423 is 32459991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19995423 - 2¹ = 19995421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19995421) 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 in 7 ways as a sum of consecutive naturals, for example, 476061 + ... + 476102.

It is an arithmetic number, because the mean of its divisors is an integer number (3808656).

Almost surely, 2^19995423 is an apocalyptic number.

19995423 is a deficient number, since it is larger than the sum of its proper divisors (10473825).

19995423 is an equidigital number, since it uses as much as digits as its factorization.

19995423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952173.

The product of its digits is 87480, while the sum is 42.

The square root of 19995423 is about 4471.6242015626. The cubic root of 19995423 is about 271.4210535973.

The spelling of 19995423 in words is "nineteen million, nine hundred ninety-five thousand, four hundred twenty-three".