18825461 has 4 divisors (see below), whose sum is σ = 18992172. Its totient is φ = 18658752.

The previous prime is 18825451. The next prime is 18825493. The reversal of 18825461 is 16452881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6708100 + 12117361 = 2590^2 + 3481^2 .

It is a cyclic number.

It is not a de Polignac number, because 18825461 - 2⁶ = 18825397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18825421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83186 + ... + 83411.

It is an arithmetic number, because the mean of its divisors is an integer number (4748043).

Almost surely, 2^18825461 is an apocalyptic number.

It is an amenable number.

18825461 is a deficient number, since it is larger than the sum of its proper divisors (166711).

18825461 is a wasteful number, since it uses less digits than its factorization.

18825461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166710.

The product of its digits is 15360, while the sum is 35.

The square root of 18825461 is about 4338.8317552078. The cubic root of 18825461 is about 266.0205620376.

The spelling of 18825461 in words is "eighteen million, eight hundred twenty-five thousand, four hundred sixty-one".