21033153717 has 8 divisors (see below), whose sum is σ = 28301491680. Its totient is φ = 13893459120.

The previous prime is 21033153707. The next prime is 21033153731. The reversal of 21033153717 is 71735133012.

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

It is not a de Polignac number, because 21033153717 - 2¹¹ = 21033151669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033153707) 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, 32160459 + ... + 32161112.

It is an arithmetic number, because the mean of its divisors is an integer number (3537686460).

Almost surely, 2^21033153717 is an apocalyptic number.

It is an amenable number.

21033153717 is a deficient number, since it is larger than the sum of its proper divisors (7268337963).

21033153717 is a wasteful number, since it uses less digits than its factorization.

21033153717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64321683.

The product of its (nonzero) digits is 13230, while the sum is 33.

Adding to 21033153717 its reverse (71735133012), we get a palindrome (92768286729).

The spelling of 21033153717 in words is "twenty-one billion, thirty-three million, one hundred fifty-three thousand, seven hundred seventeen".