18827573 has 2 divisors, whose sum is σ = 18827574. Its totient is φ = 18827572.

The previous prime is 18827533. The next prime is 18827587. The reversal of 18827573 is 37572881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17783089 + 1044484 = 4217^2 + 1022^2 .

It is a cyclic number.

It is not a de Polignac number, because 18827573 - 2¹² = 18823477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18827573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18827513) 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 as a sum of consecutive naturals, namely, 9413786 + 9413787.

It is an arithmetic number, because the mean of its divisors is an integer number (9413787).

Almost surely, 2^18827573 is an apocalyptic number.

It is an amenable number.

18827573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18827573 is an equidigital number, since it uses as much as digits as its factorization.

18827573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 18827573 is about 4339.0751318685. The cubic root of 18827573 is about 266.0305098138.

The spelling of 18827573 in words is "eighteen million, eight hundred twenty-seven thousand, five hundred seventy-three".