18073108553 has 2 divisors, whose sum is σ = 18073108554. Its totient is φ = 18073108552.

The previous prime is 18073108549. The next prime is 18073108577. The reversal of 18073108553 is 35580137081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16086356224 + 1986752329 = 126832^2 + 44573^2 .

It is a cyclic number.

It is not a de Polignac number, because 18073108553 - 2² = 18073108549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18073108553.

It is not a weakly prime, because it can be changed into another prime (18073108523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9036554276 + 9036554277.

It is an arithmetic number, because the mean of its divisors is an integer number (9036554277).

Almost surely, 2^18073108553 is an apocalyptic number.

It is an amenable number.

18073108553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18073108553 is an equidigital number, since it uses as much as digits as its factorization.

18073108553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 18073108553 in words is "eighteen billion, seventy-three million, one hundred eight thousand, five hundred fifty-three".