21798012289305 has 64 divisors (see below), whose sum is σ = 39887725068288. Its totient is φ = 9957682391040.

The previous prime is 21798012289297. The next prime is 21798012289327. The reversal of 21798012289305 is 50398221089712.

It is not a de Polignac number, because 21798012289305 - 2³ = 21798012289297 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1254408777 + ... + 1254426153.

It is an arithmetic number, because the mean of its divisors is an integer number (623245704192).

Almost surely, 2^{21798012289305} is an apocalyptic number.

It is an amenable number.

21798012289305 is a deficient number, since it is larger than the sum of its proper divisors (18089712778983).

21798012289305 is a wasteful number, since it uses less digits than its factorization.

21798012289305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25246.

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 21798012289305 in words is "twenty-one trillion, seven hundred ninety-eight billion, twelve million, two hundred eighty-nine thousand, three hundred five".