21033833012 has 6 divisors (see below), whose sum is σ = 36809207778. Its totient is φ = 10516916504.

The previous prime is 21033832993. The next prime is 21033833021.

21033833012 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 12885882256 + 8147950756 = 113516^2 + 90266^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629229123 + ... + 2629229130.

It is an arithmetic number, because the mean of its divisors is an integer number (6134867963).

Almost surely, 2^21033833012 is an apocalyptic number.

It is an amenable number.

21033833012 is a deficient number, since it is larger than the sum of its proper divisors (15775374766).

21033833012 is a wasteful number, since it uses less digits than its factorization.

21033833012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258458257 (or 5258458255 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 21033833012 in words is "twenty-one billion, thirty-three million, eight hundred thirty-three thousand, twelve".