21133136068 has 12 divisors (see below), whose sum is σ = 40345078032. Its totient is φ = 9605970920.

The previous prime is 21133136053. The next prime is 21133136093. The reversal of 21133136068 is 86063133112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240149230 + ... + 240149317.

It is an arithmetic number, because the mean of its divisors is an integer number (3362089836).

Almost surely, 2^21133136068 is an apocalyptic number.

It is an amenable number.

21133136068 is a deficient number, since it is larger than the sum of its proper divisors (19211941964).

21133136068 is a wasteful number, since it uses less digits than its factorization.

21133136068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480298562 (or 480298560 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 21133136068 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-six thousand, sixty-eight".