18800180513 has 2 divisors, whose sum is σ = 18800180514. Its totient is φ = 18800180512.

The previous prime is 18800180431. The next prime is 18800180647. The reversal of 18800180513 is 31508100881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15874236049 + 2925944464 = 125993^2 + 54092^2 .

It is a cyclic number.

It is not a de Polignac number, because 18800180513 - 2¹⁴ = 18800164129 is a prime.

It is not a weakly prime, because it can be changed into another prime (18800180213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9400090256 + 9400090257.

It is an arithmetic number, because the mean of its divisors is an integer number (9400090257).

Almost surely, 2^18800180513 is an apocalyptic number.

It is an amenable number.

18800180513 is a deficient number, since it is larger than the sum of its proper divisors (1).

18800180513 is an equidigital number, since it uses as much as digits as its factorization.

18800180513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 35.

The spelling of 18800180513 in words is "eighteen billion, eight hundred million, one hundred eighty thousand, five hundred thirteen".