204219190518823 has 2 divisors, whose sum is σ = 204219190518824. Its totient is φ = 204219190518822.

The previous prime is 204219190518757. The next prime is 204219190518841. The reversal of 204219190518823 is 328815091912402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204219190518823 - 2²¹ = 204219188421671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204219190518223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102109595259411 + 102109595259412.

It is an arithmetic number, because the mean of its divisors is an integer number (102109595259412).

Almost surely, 2^{204219190518823} is an apocalyptic number.

204219190518823 is a deficient number, since it is larger than the sum of its proper divisors (1).

204219190518823 is an equidigital number, since it uses as much as digits as its factorization.

204219190518823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 204219190518823 in words is "two hundred four trillion, two hundred nineteen billion, one hundred ninety million, five hundred eighteen thousand, eight hundred twenty-three".