21752346844 has 12 divisors (see below), whose sum is σ = 38525241384. Its totient is φ = 10745135024.

The previous prime is 21752346841. The next prime is 21752346851. The reversal of 21752346844 is 44864325712.

It is a junction number, because it is equal to n+sod(n) for n = 21752346794 and 21752346803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21752346841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32759227 + ... + 32759890.

It is an arithmetic number, because the mean of its divisors is an integer number (3210436782).

Almost surely, 2^21752346844 is an apocalyptic number.

It is an amenable number.

21752346844 is a deficient number, since it is larger than the sum of its proper divisors (16772894540).

21752346844 is a wasteful number, since it uses less digits than its factorization.

21752346844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65519204 (or 65519202 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 46.

The spelling of 21752346844 in words is "twenty-one billion, seven hundred fifty-two million, three hundred forty-six thousand, eight hundred forty-four".