20968347844 has 24 divisors (see below), whose sum is σ = 37012298400. Its totient is φ = 10393568640.

The previous prime is 20968347839. The next prime is 20968347857. The reversal of 20968347844 is 44874386902.

It is a super-2 number, since 2×20968347844² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508887 + ... + 548545.

It is an arithmetic number, because the mean of its divisors is an integer number (1542179100).

Almost surely, 2^20968347844 is an apocalyptic number.

It is an amenable number.

20968347844 is a deficient number, since it is larger than the sum of its proper divisors (16043950556).

20968347844 is a wasteful number, since it uses less digits than its factorization.

20968347844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40803 (or 40801 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 20968347844 in words is "twenty billion, nine hundred sixty-eight million, three hundred forty-seven thousand, eight hundred forty-four".