19989325 has 6 divisors (see below), whose sum is σ = 24786794. Its totient is φ = 15991440.

The previous prime is 19989289. The next prime is 19989329. The reversal of 19989325 is 52398991.

It can be written as a sum of positive squares in 3 ways, for example, as 88804 + 19900521 = 298^2 + 4461^2 .

It is not a de Polignac number, because 19989325 - 2¹¹ = 19987277 is a prime.

It is a super-2 number, since 2×19989325² = 799146227911250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19989329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399762 + ... + 399811.

Almost surely, 2^19989325 is an apocalyptic number.

It is an amenable number.

19989325 is a deficient number, since it is larger than the sum of its proper divisors (4797469).

19989325 is an equidigital number, since it uses as much as digits as its factorization.

19989325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799583 (or 799578 counting only the distinct ones).

The product of its digits is 174960, while the sum is 46.

The square root of 19989325 is about 4470.9422944162. The cubic root of 19989325 is about 271.3934590512.

The spelling of 19989325 in words is "nineteen million, nine hundred eighty-nine thousand, three hundred twenty-five".