21333565052 has 12 divisors (see below), whose sum is σ = 37339078560. Its totient is φ = 10665256896.

The previous prime is 21333565039. The next prime is 21333565063. The reversal of 21333565052 is 25056533312.

It is a congruent number.

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, 349652 + ... + 406107.

It is an arithmetic number, because the mean of its divisors is an integer number (3111589880).

Almost surely, 2^21333565052 is an apocalyptic number.

It is an amenable number.

21333565052 is a deficient number, since it is larger than the sum of its proper divisors (16005513508).

21333565052 is a wasteful number, since it uses less digits than its factorization.

21333565052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762820 (or 762818 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 35.

The spelling of 21333565052 in words is "twenty-one billion, three hundred thirty-three million, five hundred sixty-five thousand, fifty-two".