18804520612739 has 2 divisors, whose sum is σ = 18804520612740. Its totient is φ = 18804520612738.

The previous prime is 18804520612711. The next prime is 18804520612817. The reversal of 18804520612739 is 93721602540881.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18804520612739 is a prime.

It is not a weakly prime, because it can be changed into another prime (18804520612639) 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, 9402260306369 + 9402260306370.

It is an arithmetic number, because the mean of its divisors is an integer number (9402260306370).

It is a 2-persistent number, because it is pandigital, and so is 2⋅18804520612739 = 37609041225478, but 3⋅18804520612739 = 56413561838217 is not.

Almost surely, 2^{18804520612739} is an apocalyptic number.

18804520612739 is a deficient number, since it is larger than the sum of its proper divisors (1).

18804520612739 is an equidigital number, since it uses as much as digits as its factorization.

18804520612739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 18804520612739 in words is "eighteen trillion, eight hundred four billion, five hundred twenty million, six hundred twelve thousand, seven hundred thirty-nine".