204363421453 has 2 divisors, whose sum is σ = 204363421454. Its totient is φ = 204363421452.

The previous prime is 204363421439. The next prime is 204363421481. The reversal of 204363421453 is 354124363402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182054115684 + 22309305769 = 426678^2 + 149363^2 .

It is a cyclic number.

It is not a de Polignac number, because 204363421453 - 2¹⁷ = 204363290381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204363421553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102181710726 + 102181710727.

It is an arithmetic number, because the mean of its divisors is an integer number (102181710727).

Almost surely, 2^204363421453 is an apocalyptic number.

It is an amenable number.

204363421453 is a deficient number, since it is larger than the sum of its proper divisors (1).

204363421453 is an equidigital number, since it uses as much as digits as its factorization.

204363421453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 204363421453 its reverse (354124363402), we get a palindrome (558487784855).

The spelling of 204363421453 in words is "two hundred four billion, three hundred sixty-three million, four hundred twenty-one thousand, four hundred fifty-three".