19425005 has 4 divisors (see below), whose sum is σ = 23310012. Its totient is φ = 15540000.

The previous prime is 19425001. The next prime is 19425013. The reversal of 19425005 is 50052491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50052491 = 2503 ⋅19997.

It can be written as a sum of positive squares in 2 ways, for example, as 10201636 + 9223369 = 3194^2 + 3037^2 .

It is not a de Polignac number, because 19425005 - 2² = 19425001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19425001) 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 3 ways as a sum of consecutive naturals, for example, 1942496 + ... + 1942505.

It is an arithmetic number, because the mean of its divisors is an integer number (5827503).

Almost surely, 2^19425005 is an apocalyptic number.

It is an amenable number.

19425005 is a deficient number, since it is larger than the sum of its proper divisors (3885007).

19425005 is an equidigital number, since it uses as much as digits as its factorization.

19425005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885006.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 19425005 is about 4407.3807414382. The cubic root of 19425005 is about 268.8151325821.

Adding to 19425005 its reverse (50052491), we get a palindrome (69477496).

The spelling of 19425005 in words is "nineteen million, four hundred twenty-five thousand, five".