18842225 has 6 divisors (see below), whose sum is σ = 23364390. Its totient is φ = 15073760.

The previous prime is 18842191. The next prime is 18842231. The reversal of 18842225 is 52224881.

It can be written as a sum of positive squares in 3 ways, for example, as 214369 + 18627856 = 463^2 + 4316^2 .

It is not a de Polignac number, because 18842225 - 2¹² = 18838129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18842191 and 18842200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376820 + ... + 376869.

It is an arithmetic number, because the mean of its divisors is an integer number (3894065).

Almost surely, 2^18842225 is an apocalyptic number.

It is an amenable number.

18842225 is a deficient number, since it is larger than the sum of its proper divisors (4522165).

18842225 is an equidigital number, since it uses as much as digits as its factorization.

18842225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753699 (or 753694 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 18842225 is about 4340.7631817458. The cubic root of 18842225 is about 266.0995020365.

The spelling of 18842225 in words is "eighteen million, eight hundred forty-two thousand, two hundred twenty-five".