18672831422789 has 2 divisors, whose sum is σ = 18672831422790. Its totient is φ = 18672831422788.

The previous prime is 18672831422671. The next prime is 18672831422831. The reversal of 18672831422789 is 98722413827681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17919855244225 + 752976178564 = 4233185^2 + 867742^2 .

It is a cyclic number.

It is not a de Polignac number, because 18672831422789 - 2³⁶ = 18604111946053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18672831422389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9336415711394 + 9336415711395.

It is an arithmetic number, because the mean of its divisors is an integer number (9336415711395).

Almost surely, 2^{18672831422789} is an apocalyptic number.

It is an amenable number.

18672831422789 is a deficient number, since it is larger than the sum of its proper divisors (1).

18672831422789 is an equidigital number, since it uses as much as digits as its factorization.

18672831422789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130056192, while the sum is 68.

The spelling of 18672831422789 in words is "eighteen trillion, six hundred seventy-two billion, eight hundred thirty-one million, four hundred twenty-two thousand, seven hundred eighty-nine".