21098517590244 has 48 divisors (see below), whose sum is σ = 49807155605760. Its totient is φ = 6950447074560.

The previous prime is 21098517590233. The next prime is 21098517590279. The reversal of 21098517590244 is 44209571589012.

It is a happy number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 2584687 + ... + 6991254.

It is an arithmetic number, because the mean of its divisors is an integer number (1037649075120).

Almost surely, 2^{21098517590244} is an apocalyptic number.

It is an amenable number.

21098517590244 is an abundant number, since it is smaller than the sum of its proper divisors (28708638015516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21098517590244 is a wasteful number, since it uses less digits than its factorization.

21098517590244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578100 (or 9578098 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 21098517590244 in words is "twenty-one trillion, ninety-eight billion, five hundred seventeen million, five hundred ninety thousand, two hundred forty-four".