21706552133 has 8 divisors (see below), whose sum is σ = 24809715840. Its totient is φ = 18603945360.

The previous prime is 21706552099. The next prime is 21706552159. The reversal of 21706552133 is 33125560712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21706552133 - 2⁸ = 21706551877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21706552093 and 21706552102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21706552163) 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 7 ways as a sum of consecutive naturals, for example, 52073 + ... + 214766.

It is an arithmetic number, because the mean of its divisors is an integer number (3101214480).

Almost surely, 2^21706552133 is an apocalyptic number.

It is an amenable number.

21706552133 is a deficient number, since it is larger than the sum of its proper divisors (3103163707).

21706552133 is a wasteful number, since it uses less digits than its factorization.

21706552133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278467.

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 21706552133 in words is "twenty-one billion, seven hundred six million, five hundred fifty-two thousand, one hundred thirty-three".