204562030021 has 2 divisors, whose sum is σ = 204562030022. Its totient is φ = 204562030020.

The previous prime is 204562029949. The next prime is 204562030031. The reversal of 204562030021 is 120030265402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169822289025 + 34739740996 = 412095^2 + 186386^2 .

It is a cyclic number.

It is not a de Polignac number, because 204562030021 - 2¹⁵ = 204561997253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204562030031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102281015010 + 102281015011.

It is an arithmetic number, because the mean of its divisors is an integer number (102281015011).

Almost surely, 2^204562030021 is an apocalyptic number.

It is an amenable number.

204562030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

204562030021 is an equidigital number, since it uses as much as digits as its factorization.

204562030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 204562030021 its reverse (120030265402), we get a palindrome (324592295423).

The spelling of 204562030021 in words is "two hundred four billion, five hundred sixty-two million, thirty thousand, twenty-one".