18782525 has 6 divisors (see below), whose sum is σ = 23290362. Its totient is φ = 15026000.

The previous prime is 18782509. The next prime is 18782531. The reversal of 18782525 is 52528781.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24964 + 18757561 = 158^2 + 4331^2 .

It is not a de Polignac number, because 18782525 - 2⁴ = 18782509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 375626 + ... + 375675.

It is an arithmetic number, because the mean of its divisors is an integer number (3881727).

Almost surely, 2^18782525 is an apocalyptic number.

It is an amenable number.

18782525 is a deficient number, since it is larger than the sum of its proper divisors (4507837).

18782525 is an equidigital number, since it uses as much as digits as its factorization.

18782525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751311 (or 751306 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 18782525 is about 4333.8810551283. The cubic root of 18782525 is about 265.8181667584.

The spelling of 18782525 in words is "eighteen million, seven hundred eighty-two thousand, five hundred twenty-five".