20481627589 has 2 divisors, whose sum is σ = 20481627590. Its totient is φ = 20481627588.

The previous prime is 20481627587. The next prime is 20481627601. The reversal of 20481627589 is 98572618402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13702575364 + 6779052225 = 117058^2 + 82335^2 .

It is a cyclic number.

It is not a de Polignac number, because 20481627589 - 2¹ = 20481627587 is a prime.

Together with 20481627587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20481627587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10240813794 + 10240813795.

It is an arithmetic number, because the mean of its divisors is an integer number (10240813795).

Almost surely, 2^20481627589 is an apocalyptic number.

It is an amenable number.

20481627589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20481627589 is an equidigital number, since it uses as much as digits as its factorization.

20481627589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 20481627589 in words is "twenty billion, four hundred eighty-one million, six hundred twenty-seven thousand, five hundred eighty-nine".