20215260589 has 2 divisors, whose sum is σ = 20215260590. Its totient is φ = 20215260588.

The previous prime is 20215260517. The next prime is 20215260601. The reversal of 20215260589 is 98506251202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18075458025 + 2139802564 = 134445^2 + 46258^2 .

It is a cyclic number.

It is not a de Polignac number, because 20215260589 - 2⁹ = 20215260077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20215260089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10107630294 + 10107630295.

It is an arithmetic number, because the mean of its divisors is an integer number (10107630295).

Almost surely, 2^20215260589 is an apocalyptic number.

It is an amenable number.

20215260589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20215260589 is an equidigital number, since it uses as much as digits as its factorization.

20215260589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 20215260589 in words is "twenty billion, two hundred fifteen million, two hundred sixty thousand, five hundred eighty-nine".