21033109996 has 12 divisors (see below), whose sum is σ = 37502432352. Its totient is φ = 10318129328.

The previous prime is 21033109963. The next prime is 21033109997. The reversal of 21033109996 is 69990133012.

It is a super-2 number, since 2×21033109996² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21033109997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49606180 + ... + 49606603.

It is an arithmetic number, because the mean of its divisors is an integer number (3125202696).

Almost surely, 2^21033109996 is an apocalyptic number.

It is an amenable number.

21033109996 is a deficient number, since it is larger than the sum of its proper divisors (16469322356).

21033109996 is a wasteful number, since it uses less digits than its factorization.

21033109996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99212840 (or 99212838 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 43.

The spelling of 21033109996 in words is "twenty-one billion, thirty-three million, one hundred nine thousand, nine hundred ninety-six".