18475573 has 2 divisors, whose sum is σ = 18475574. Its totient is φ = 18475572.

The previous prime is 18475571. The next prime is 18475607. The reversal of 18475573 is 37557481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 6517809 = 3458^2 + 2553^2 .

It is a cyclic number.

It is not a de Polignac number, because 18475573 - 2¹ = 18475571 is a prime.

Together with 18475571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18475571) 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, 9237786 + 9237787.

It is an arithmetic number, because the mean of its divisors is an integer number (9237787).

Almost surely, 2^18475573 is an apocalyptic number.

It is an amenable number.

18475573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18475573 is an equidigital number, since it uses as much as digits as its factorization.

18475573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 40.

The square root of 18475573 is about 4298.3221145000. The cubic root of 18475573 is about 264.3621684126.

It can be divided in two parts, 184 and 75573, that added together give a palindrome (75757).

The spelling of 18475573 in words is "eighteen million, four hundred seventy-five thousand, five hundred seventy-three".