21033132309 has 96 divisors (see below), whose sum is σ = 38668990464. Its totient is φ = 10739589120.

The previous prime is 21033132287. The next prime is 21033132311. The reversal of 21033132309 is 90323133012.

21033132309 is a `hidden beast` number, since 2 + 1 + 0 + 331 + 323 + 0 + 9 = 666.

It is not a de Polignac number, because 21033132309 - 2⁷ = 21033132181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033132349) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1753677 + ... + 1765629.

It is an arithmetic number, because the mean of its divisors is an integer number (402801984).

Almost surely, 2^21033132309 is an apocalyptic number.

It is an amenable number.

21033132309 is a deficient number, since it is larger than the sum of its proper divisors (17635858155).

21033132309 is a wasteful number, since it uses less digits than its factorization.

21033132309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12067 (or 12064 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The spelling of 21033132309 in words is "twenty-one billion, thirty-three million, one hundred thirty-two thousand, three hundred nine".