21113533564 has 6 divisors (see below), whose sum is σ = 36948683744. Its totient is φ = 10556766780.

The previous prime is 21113533541. The next prime is 21113533579. The reversal of 21113533564 is 46533531112.

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, 2639191692 + ... + 2639191699.

Almost surely, 2^21113533564 is an apocalyptic number.

It is an amenable number.

21113533564 is a deficient number, since it is larger than the sum of its proper divisors (15835150180).

21113533564 is a wasteful number, since it uses less digits than its factorization.

21113533564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278383395 (or 5278383393 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The spelling of 21113533564 in words is "twenty-one billion, one hundred thirteen million, five hundred thirty-three thousand, five hundred sixty-four".