25263067021 has 2 divisors, whose sum is σ = 25263067022. Its totient is φ = 25263067020.

The previous prime is 25263066947. The next prime is 25263067103. The reversal of 25263067021 is 12076036252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19636416900 + 5626650121 = 140130^2 + 75011^2 .

It is a cyclic number.

It is not a de Polignac number, because 25263067021 - 2¹¹ = 25263064973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25263067721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12631533510 + 12631533511.

It is an arithmetic number, because the mean of its divisors is an integer number (12631533511).

Almost surely, 2^25263067021 is an apocalyptic number.

It is an amenable number.

25263067021 is a deficient number, since it is larger than the sum of its proper divisors (1).

25263067021 is an equidigital number, since it uses as much as digits as its factorization.

25263067021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 25263067021 in words is "twenty-five billion, two hundred sixty-three million, sixty-seven thousand, twenty-one".