19397825 has 12 divisors (see below), whose sum is σ = 24241008. Its totient is φ = 15397200.

The previous prime is 19397813. The next prime is 19397827. The reversal of 19397825 is 52879391.

It is not a de Polignac number, because 19397825 - 2⁸ = 19397569 is a prime.

It is a super-2 number, since 2×19397825² = 752551229461250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19397827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314 + ... + 6236.

It is an arithmetic number, because the mean of its divisors is an integer number (2020084).

Almost surely, 2^19397825 is an apocalyptic number.

It is an amenable number.

19397825 is a deficient number, since it is larger than the sum of its proper divisors (4843183).

19397825 is a wasteful number, since it uses less digits than its factorization.

19397825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064 (or 6059 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 19397825 is about 4404.2961980321. The cubic root of 19397825 is about 268.6896962227.

The spelling of 19397825 in words is "nineteen million, three hundred ninety-seven thousand, eight hundred twenty-five".