18137313533 has 2 divisors, whose sum is σ = 18137313534. Its totient is φ = 18137313532.

The previous prime is 18137313529. The next prime is 18137313559. The reversal of 18137313533 is 33531373181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18009103204 + 128210329 = 134198^2 + 11323^2 .

It is a cyclic number.

It is not a de Polignac number, because 18137313533 - 2² = 18137313529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18137310533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9068656766 + 9068656767.

It is an arithmetic number, because the mean of its divisors is an integer number (9068656767).

Almost surely, 2^18137313533 is an apocalyptic number.

It is an amenable number.

18137313533 is a deficient number, since it is larger than the sum of its proper divisors (1).

18137313533 is an equidigital number, since it uses as much as digits as its factorization.

18137313533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The spelling of 18137313533 in words is "eighteen billion, one hundred thirty-seven million, three hundred thirteen thousand, five hundred thirty-three".