19018225 has 6 divisors (see below), whose sum is σ = 23582630. Its totient is φ = 15214560.

The previous prime is 19018201. The next prime is 19018243. The reversal of 19018225 is 52281091.

It can be written as a sum of positive squares in 3 ways, for example, as 2241009 + 16777216 = 1497^2 + 4096^2 .

It is not a de Polignac number, because 19018225 - 2¹¹ = 19016177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19018193 and 19018202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 380340 + ... + 380389.

Almost surely, 2^19018225 is an apocalyptic number.

It is an amenable number.

19018225 is a deficient number, since it is larger than the sum of its proper divisors (4564405).

19018225 is an equidigital number, since it uses as much as digits as its factorization.

19018225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760739 (or 760734 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 19018225 is about 4360.9889933363. The cubic root of 19018225 is about 266.9254562389.

The spelling of 19018225 in words is "nineteen million, eighteen thousand, two hundred twenty-five".