204421320043019 has 2 divisors, whose sum is σ = 204421320043020. Its totient is φ = 204421320043018.

The previous prime is 204421320043009. The next prime is 204421320043067. The reversal of 204421320043019 is 910340023124402.

204421320043019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204421320043019 is a prime.

It is a super-2 number, since 2×204421320043019² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204421320043019.

It is not a weakly prime, because it can be changed into another prime (204421320043009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102210660021509 + 102210660021510.

It is an arithmetic number, because the mean of its divisors is an integer number (102210660021510).

Almost surely, 2^{204421320043019} is an apocalyptic number.

204421320043019 is a deficient number, since it is larger than the sum of its proper divisors (1).

204421320043019 is an equidigital number, since it uses as much as digits as its factorization.

204421320043019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 204421320043019 in words is "two hundred four trillion, four hundred twenty-one billion, three hundred twenty million, forty-three thousand, nineteen".