204219188421671 has 2 divisors, whose sum is σ = 204219188421672. Its totient is φ = 204219188421670.

The previous prime is 204219188421659. The next prime is 204219188421737. The reversal of 204219188421671 is 176124881912402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204219188421671 - 2⁶ = 204219188421607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204219188421271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102109594210835 + 102109594210836.

It is an arithmetic number, because the mean of its divisors is an integer number (102109594210836).

Almost surely, 2^{204219188421671} is an apocalyptic number.

204219188421671 is a deficient number, since it is larger than the sum of its proper divisors (1).

204219188421671 is an equidigital number, since it uses as much as digits as its factorization.

204219188421671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 204219188421671 in words is "two hundred four trillion, two hundred nineteen billion, one hundred eighty-eight million, four hundred twenty-one thousand, six hundred seventy-one".