19897325 has 24 divisors (see below), whose sum is σ = 28635072. Its totient is φ = 13432320.

The previous prime is 19897301. The next prime is 19897331. The reversal of 19897325 is 52379891.

It is not a de Polignac number, because 19897325 - 2¹⁶ = 19831789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 10877 + ... + 12573.

It is an arithmetic number, because the mean of its divisors is an integer number (1193128).

Almost surely, 2^19897325 is an apocalyptic number.

It is an amenable number.

19897325 is a deficient number, since it is larger than the sum of its proper divisors (8737747).

19897325 is a wasteful number, since it uses less digits than its factorization.

19897325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1776 counting only the distinct ones).

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

The square root of 19897325 is about 4460.6417699699. The cubic root of 19897325 is about 270.9764597863.

The spelling of 19897325 in words is "nineteen million, eight hundred ninety-seven thousand, three hundred twenty-five".