18061825 has 12 divisors (see below), whose sum is σ = 22451068. Its totient is φ = 14414400.

The previous prime is 18061819. The next prime is 18061829. The reversal of 18061825 is 52816081.

It can be written as a sum of positive squares in 6 ways, for example, as 2093809 + 15968016 = 1447^2 + 3996^2 .

It is not a de Polignac number, because 18061825 - 2¹¹ = 18059777 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18061829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15979 + ... + 17071.

Almost surely, 2^18061825 is an apocalyptic number.

It is an amenable number.

18061825 is a deficient number, since it is larger than the sum of its proper divisors (4389243).

18061825 is a wasteful number, since it uses less digits than its factorization.

18061825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 18061825 is about 4249.9205874934. The cubic root of 18061825 is about 262.3738471682.

The spelling of 18061825 in words is "eighteen million, sixty-one thousand, eight hundred twenty-five".