18982553 has 2 divisors, whose sum is σ = 18982554. Its totient is φ = 18982552.

The previous prime is 18982547. The next prime is 18982573. The reversal of 18982553 is 35528981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14500864 + 4481689 = 3808^2 + 2117^2 .

It is an emirp because it is prime and its reverse (35528981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18982553 - 2⁸ = 18982297 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 18982553.

It is not a weakly prime, because it can be changed into another prime (18982573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9491276 + 9491277.

It is an arithmetic number, because the mean of its divisors is an integer number (9491277).

Almost surely, 2^18982553 is an apocalyptic number.

It is an amenable number.

18982553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18982553 is an equidigital number, since it uses as much as digits as its factorization.

18982553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The square root of 18982553 is about 4356.8971757433. The cubic root of 18982553 is about 266.7584633618.

The spelling of 18982553 in words is "eighteen million, nine hundred eighty-two thousand, five hundred fifty-three".