21010414489 has 2 divisors, whose sum is σ = 21010414490. Its totient is φ = 21010414488.

The previous prime is 21010414487. The next prime is 21010414511. The reversal of 21010414489 is 98441401012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21005574489 + 4840000 = 144933^2 + 2200^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010414489 - 2¹ = 21010414487 is a prime.

It is a super-2 number, since 2×21010414489² (a number of 21 digits) contains 22 as substring.

Together with 21010414487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21010414483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505207244 + 10505207245.

It is an arithmetic number, because the mean of its divisors is an integer number (10505207245).

Almost surely, 2^21010414489 is an apocalyptic number.

It is an amenable number.

21010414489 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010414489 is an equidigital number, since it uses as much as digits as its factorization.

21010414489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 21010414489 in words is "twenty-one billion, ten million, four hundred fourteen thousand, four hundred eighty-nine".