18874825 has 6 divisors (see below), whose sum is σ = 23404814. Its totient is φ = 15099840.

The previous prime is 18874787. The next prime is 18874831. The reversal of 18874825 is 52847881.

It can be written as a sum of positive squares in 3 ways, for example, as 4489 + 18870336 = 67^2 + 4344^2 .

It is not a de Polignac number, because 18874825 - 2⁹ = 18874313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 377472 + ... + 377521.

Almost surely, 2^18874825 is an apocalyptic number.

It is an amenable number.

18874825 is a deficient number, since it is larger than the sum of its proper divisors (4529989).

18874825 is an equidigital number, since it uses as much as digits as its factorization.

18874825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755003 (or 754998 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 18874825 is about 4344.5166589622. The cubic root of 18874825 is about 266.2528782191.

The spelling of 18874825 in words is "eighteen million, eight hundred seventy-four thousand, eight hundred twenty-five".