21449941833 has 16 divisors (see below), whose sum is σ = 30839457600. Its totient is φ = 13216907520.

The previous prime is 21449941789. The next prime is 21449941873. The reversal of 21449941833 is 33814994412.

It is not a de Polignac number, because 21449941833 - 2¹² = 21449937737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21449941873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4586868 + ... + 4591541.

It is an arithmetic number, because the mean of its divisors is an integer number (1927466100).

Almost surely, 2^21449941833 is an apocalyptic number.

It is an amenable number.

21449941833 is a deficient number, since it is larger than the sum of its proper divisors (9389515767).

21449941833 is a wasteful number, since it uses less digits than its factorization.

21449941833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9178472.

The product of its digits is 746496, while the sum is 48.

The spelling of 21449941833 in words is "twenty-one billion, four hundred forty-nine million, nine hundred forty-one thousand, eight hundred thirty-three".