21833893516 has 6 divisors (see below), whose sum is σ = 38209313660. Its totient is φ = 10916946756.

The previous prime is 21833893513. The next prime is 21833893573. The reversal of 21833893516 is 61539833812.

It is a self number, because there is not a number n which added to its sum of digits gives 21833893516.

It is not an unprimeable number, because it can be changed into a prime (21833893511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2729236686 + ... + 2729236693.

Almost surely, 2^21833893516 is an apocalyptic number.

It is an amenable number.

21833893516 is a deficient number, since it is larger than the sum of its proper divisors (16375420144).

21833893516 is a wasteful number, since it uses less digits than its factorization.

21833893516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458473383 (or 5458473381 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The spelling of 21833893516 in words is "twenty-one billion, eight hundred thirty-three million, eight hundred ninety-three thousand, five hundred sixteen".