18349920066953 has 2 divisors, whose sum is σ = 18349920066954. Its totient is φ = 18349920066952.

The previous prime is 18349920066911. The next prime is 18349920067067. The reversal of 18349920066953 is 35966002994381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15945550403344 + 2404369663609 = 3993188^2 + 1550603^2 .

It is a cyclic number.

It is not a de Polignac number, because 18349920066953 - 2¹⁸ = 18349919804809 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 18349920066953.

It is not a weakly prime, because it can be changed into another prime (18349920066553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174960033476 + 9174960033477.

It is an arithmetic number, because the mean of its divisors is an integer number (9174960033477).

Almost surely, 2^{18349920066953} is an apocalyptic number.

It is an amenable number.

18349920066953 is a deficient number, since it is larger than the sum of its proper divisors (1).

18349920066953 is an equidigital number, since it uses as much as digits as its factorization.

18349920066953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75582720, while the sum is 65.

The spelling of 18349920066953 in words is "eighteen trillion, three hundred forty-nine billion, nine hundred twenty million, sixty-six thousand, nine hundred fifty-three".