18237423553 has 2 divisors, whose sum is σ = 18237423554. Its totient is φ = 18237423552.

The previous prime is 18237423539. The next prime is 18237423587. The reversal of 18237423553 is 35532473281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17474724864 + 762698689 = 132192^2 + 27617^2 .

It is a cyclic number.

It is not a de Polignac number, because 18237423553 - 2⁹ = 18237423041 is a prime.

It is not a weakly prime, because it can be changed into another prime (18237463553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9118711776 + 9118711777.

It is an arithmetic number, because the mean of its divisors is an integer number (9118711777).

Almost surely, 2^18237423553 is an apocalyptic number.

It is an amenable number.

18237423553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18237423553 is an equidigital number, since it uses as much as digits as its factorization.

18237423553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 43.

The spelling of 18237423553 in words is "eighteen billion, two hundred thirty-seven million, four hundred twenty-three thousand, five hundred fifty-three".