21333502106 has 36 divisors (see below), whose sum is σ = 38258291358. Its totient is φ = 8895767328.

The previous prime is 21333502061. The next prime is 21333502109. The reversal of 21333502106 is 60120533312.

It can be written as a sum of positive squares in 3 ways, for example, as 20969646481 + 363855625 = 144809^2 + 19075^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21333502109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 54656 + ... + 213668.

Almost surely, 2^21333502106 is an apocalyptic number.

21333502106 is a deficient number, since it is larger than the sum of its proper divisors (16924789252).

21333502106 is a wasteful number, since it uses less digits than its factorization.

21333502106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159103 (or 159059 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The spelling of 21333502106 in words is "twenty-one billion, three hundred thirty-three million, five hundred two thousand, one hundred six".