204120019 has 2 divisors, whose sum is σ = 204120020. Its totient is φ = 204120018.

The previous prime is 204119947. The next prime is 204120023. The reversal of 204120019 is 910021402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204120019 - 2¹³ = 204111827 is a prime.

It is a super-2 number, since 2×204120019² = 83329964313120722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204119978 and 204120005.

It is not a weakly prime, because it can be changed into another prime (204120079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102060009 + 102060010.

It is an arithmetic number, because the mean of its divisors is an integer number (102060010).

Almost surely, 2^204120019 is an apocalyptic number.

204120019 is a deficient number, since it is larger than the sum of its proper divisors (1).

204120019 is an equidigital number, since it uses as much as digits as its factorization.

204120019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 204120019 is about 14287.0577446863. The cubic root of 204120019 is about 588.7919541027.

The spelling of 204120019 in words is "two hundred four million, one hundred twenty thousand, nineteen".