21894946244 has 12 divisors (see below), whose sum is σ = 38569906368. Its totient is φ = 10874973000.

The previous prime is 21894946237. The next prime is 21894946273. The reversal of 21894946244 is 44264949812.

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, 18124352 + ... + 18125559.

It is an arithmetic number, because the mean of its divisors is an integer number (3214158864).

Almost surely, 2^21894946244 is an apocalyptic number.

It is an amenable number.

21894946244 is a deficient number, since it is larger than the sum of its proper divisors (16674960124).

21894946244 is a wasteful number, since it uses less digits than its factorization.

21894946244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36250066 (or 36250064 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 53.

The spelling of 21894946244 in words is "twenty-one billion, eight hundred ninety-four million, nine hundred forty-six thousand, two hundred forty-four".