18028537506823 has 2 divisors, whose sum is σ = 18028537506824. Its totient is φ = 18028537506822.

The previous prime is 18028537506787. The next prime is 18028537506827. The reversal of 18028537506823 is 32860573582081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18028537506823 is a prime.

It is a super-3 number, since 3×18028537506823³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18028537506827) 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, 9014268753411 + 9014268753412.

It is an arithmetic number, because the mean of its divisors is an integer number (9014268753412).

Almost surely, 2^{18028537506823} is an apocalyptic number.

18028537506823 is a deficient number, since it is larger than the sum of its proper divisors (1).

18028537506823 is an equidigital number, since it uses as much as digits as its factorization.

18028537506823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 18028537506823 in words is "eighteen trillion, twenty-eight billion, five hundred thirty-seven million, five hundred six thousand, eight hundred twenty-three".