21948473814688 has 24 divisors (see below), whose sum is σ = 45485324025120. Its totient is φ = 10396645490880.

The previous prime is 21948473814629. The next prime is 21948473814697. The reversal of 21948473814688 is 88641837484912.

It is a self number, because there is not a number n which added to its sum of digits gives 21948473814688.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18049731148 + ... + 18049732363.

It is an arithmetic number, because the mean of its divisors is an integer number (1895221834380).

Almost surely, 2^{21948473814688} is an apocalyptic number.

It is an amenable number.

21948473814688 is an abundant number, since it is smaller than the sum of its proper divisors (23536850210432).

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

21948473814688 is a wasteful number, since it uses less digits than its factorization.

21948473814688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36099463540 (or 36099463532 counting only the distinct ones).

The product of its digits is 594542592, while the sum is 73.

The spelling of 21948473814688 in words is "twenty-one trillion, nine hundred forty-eight billion, four hundred seventy-three million, eight hundred fourteen thousand, six hundred eighty-eight".