204625262021 has 2 divisors, whose sum is σ = 204625262022. Its totient is φ = 204625262020.

The previous prime is 204625262011. The next prime is 204625262041. The reversal of 204625262021 is 120262526402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163462533025 + 41162728996 = 404305^2 + 202886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204625262021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204625262011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102312631010 + 102312631011.

It is an arithmetic number, because the mean of its divisors is an integer number (102312631011).

Almost surely, 2^204625262021 is an apocalyptic number.

It is an amenable number.

204625262021 is a deficient number, since it is larger than the sum of its proper divisors (1).

204625262021 is an equidigital number, since it uses as much as digits as its factorization.

204625262021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 204625262021 its reverse (120262526402), we get a palindrome (324887788423).

The spelling of 204625262021 in words is "two hundred four billion, six hundred twenty-five million, two hundred sixty-two thousand, twenty-one".