18764752921799 has 2 divisors, whose sum is σ = 18764752921800. Its totient is φ = 18764752921798.

The previous prime is 18764752921721. The next prime is 18764752921843. The reversal of 18764752921799 is 99712925746781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18764752921799 - 2⁴⁰ = 17665241294023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18764752921099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9382376460899 + 9382376460900.

It is an arithmetic number, because the mean of its divisors is an integer number (9382376460900).

Almost surely, 2^{18764752921799} is an apocalyptic number.

18764752921799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18764752921799 is an equidigital number, since it uses as much as digits as its factorization.

18764752921799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960180480, while the sum is 77.

The spelling of 18764752921799 in words is "eighteen trillion, seven hundred sixty-four billion, seven hundred fifty-two million, nine hundred twenty-one thousand, seven hundred ninety-nine".