19394425 has 6 divisors (see below), whose sum is σ = 24049118. Its totient is φ = 15515520.

The previous prime is 19394413. The next prime is 19394429. The reversal of 19394425 is 52449391.

It can be written as a sum of positive squares in 3 ways, for example, as 5822569 + 13571856 = 2413^2 + 3684^2 .

It is not a de Polignac number, because 19394425 - 2¹³ = 19386233 is a prime.

It is a super-2 number, since 2×19394425² = 752287442161250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19394429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387864 + ... + 387913.

Almost surely, 2^19394425 is an apocalyptic number.

It is an amenable number.

19394425 is a deficient number, since it is larger than the sum of its proper divisors (4654693).

19394425 is an equidigital number, since it uses as much as digits as its factorization.

19394425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775787 (or 775782 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 19394425 is about 4403.9101943614. The cubic root of 19394425 is about 268.6739968965.

The spelling of 19394425 in words is "nineteen million, three hundred ninety-four thousand, four hundred twenty-five".