20075630581 has 2 divisors, whose sum is σ = 20075630582. Its totient is φ = 20075630580.

The previous prime is 20075630579. The next prime is 20075630611. The reversal of 20075630581 is 18503657002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18220950225 + 1854680356 = 134985^2 + 43066^2 .

It is a cyclic number.

It is not a de Polignac number, because 20075630581 - 2¹ = 20075630579 is a prime.

It is a super-2 number, since 2×20075630581² (a number of 21 digits) contains 22 as substring.

Together with 20075630579, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20075630581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20075670581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10037815290 + 10037815291.

It is an arithmetic number, because the mean of its divisors is an integer number (10037815291).

Almost surely, 2^20075630581 is an apocalyptic number.

It is an amenable number.

20075630581 is a deficient number, since it is larger than the sum of its proper divisors (1).

20075630581 is an equidigital number, since it uses as much as digits as its factorization.

20075630581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 20075630581 in words is "twenty billion, seventy-five million, six hundred thirty thousand, five hundred eighty-one".