204021240403 has 2 divisors, whose sum is σ = 204021240404. Its totient is φ = 204021240402.

The previous prime is 204021240383. The next prime is 204021240487. The reversal of 204021240403 is 304042120402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204021240403 is a prime.

It is not a weakly prime, because it can be changed into another prime (204021240503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102010620201 + 102010620202.

It is an arithmetic number, because the mean of its divisors is an integer number (102010620202).

Almost surely, 2^204021240403 is an apocalyptic number.

204021240403 is a deficient number, since it is larger than the sum of its proper divisors (1).

204021240403 is an equidigital number, since it uses as much as digits as its factorization.

204021240403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 204021240403 its reverse (304042120402), we get a palindrome (508063360805).

The spelling of 204021240403 in words is "two hundred four billion, twenty-one million, two hundred forty thousand, four hundred three".