21273284808489 has 48 divisors (see below), whose sum is σ = 34958330827200. Its totient is φ = 11433846445056.

The previous prime is 21273284808469. The next prime is 21273284808547. The reversal of 21273284808489 is 98480848237212.

It is a happy number.

It is not a de Polignac number, because 21273284808489 - 2¹³ = 21273284800297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21273284808469) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1250317 + ... + 6641525.

It is an arithmetic number, because the mean of its divisors is an integer number (728298558900).

Almost surely, 2^{21273284808489} is an apocalyptic number.

It is an amenable number.

21273284808489 is a deficient number, since it is larger than the sum of its proper divisors (13685046018711).

21273284808489 is a wasteful number, since it uses less digits than its factorization.

21273284808489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392822 (or 5392815 counting only the distinct ones).

The product of its (nonzero) digits is 99090432, while the sum is 66.

The spelling of 21273284808489 in words is "twenty-one trillion, two hundred seventy-three billion, two hundred eighty-four million, eight hundred eight thousand, four hundred eighty-nine".