21480360589 has 2 divisors, whose sum is σ = 21480360590. Its totient is φ = 21480360588.

The previous prime is 21480360569. The next prime is 21480360641. The reversal of 21480360589 is 98506308412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21069974025 + 410386564 = 145155^2 + 20258^2 .

It is a cyclic number.

It is not a de Polignac number, because 21480360589 - 2¹⁵ = 21480327821 is a prime.

It is a super-2 number, since 2×21480360589² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21480360569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10740180294 + 10740180295.

It is an arithmetic number, because the mean of its divisors is an integer number (10740180295).

Almost surely, 2^21480360589 is an apocalyptic number.

It is an amenable number.

21480360589 is a deficient number, since it is larger than the sum of its proper divisors (1).

21480360589 is an equidigital number, since it uses as much as digits as its factorization.

21480360589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 21480360589 in words is "twenty-one billion, four hundred eighty million, three hundred sixty thousand, five hundred eighty-nine".