21983067850 has 12 divisors (see below), whose sum is σ = 40888506294. Its totient is φ = 8793227120.

The previous prime is 21983067823. The next prime is 21983067871. The reversal of 21983067850 is 5876038912.

It can be written as a sum of positive squares in 3 ways, for example, as 13894044129 + 8089023721 = 117873^2 + 89939^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21983067794 and 21983067803.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219830629 + ... + 219830728.

Almost surely, 2^21983067850 is an apocalyptic number.

21983067850 is a deficient number, since it is larger than the sum of its proper divisors (18905438444).

21983067850 is a wasteful number, since it uses less digits than its factorization.

21983067850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439661369 (or 439661364 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 21983067850 in words is "twenty-one billion, nine hundred eighty-three million, sixty-seven thousand, eight hundred fifty".