20204452456387 has 2 divisors, whose sum is σ = 20204452456388. Its totient is φ = 20204452456386.

The previous prime is 20204452456343. The next prime is 20204452456417. The reversal of 20204452456387 is 78365425440202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20204452456387 - 2⁷ = 20204452456259 is a prime.

It is not a weakly prime, because it can be changed into another prime (20204452451387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102226228193 + 10102226228194.

It is an arithmetic number, because the mean of its divisors is an integer number (10102226228194).

Almost surely, 2^{20204452456387} is an apocalyptic number.

20204452456387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204452456387 is an equidigital number, since it uses as much as digits as its factorization.

20204452456387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12902400, while the sum is 52.

Adding to 20204452456387 its reverse (78365425440202), we get a palindrome (98569877896589).

The spelling of 20204452456387 in words is "twenty trillion, two hundred four billion, four hundred fifty-two million, four hundred fifty-six thousand, three hundred eighty-seven".