18300697729 has 2 divisors, whose sum is σ = 18300697730. Its totient is φ = 18300697728.

The previous prime is 18300697673. The next prime is 18300697733. The reversal of 18300697729 is 92779600381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18079491600 + 221206129 = 134460^2 + 14873^2 .

It is a cyclic number.

It is not a de Polignac number, because 18300697729 - 2¹¹ = 18300695681 is a prime.

It is not a weakly prime, because it can be changed into another prime (18300697769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9150348864 + 9150348865.

It is an arithmetic number, because the mean of its divisors is an integer number (9150348865).

Almost surely, 2^18300697729 is an apocalyptic number.

It is an amenable number.

18300697729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18300697729 is an equidigital number, since it uses as much as digits as its factorization.

18300697729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 18300697729 in words is "eighteen billion, three hundred million, six hundred ninety-seven thousand, seven hundred twenty-nine".