21616272033 has 4 divisors (see below), whose sum is σ = 28821696048. Its totient is φ = 14410848020.

The previous prime is 21616272019. The next prime is 21616272037. The reversal of 21616272033 is 33027261612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21616272033 - 2⁸ = 21616271777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21616271985 and 21616272003.

It is not an unprimeable number, because it can be changed into a prime (21616272037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3602712003 + ... + 3602712008.

It is an arithmetic number, because the mean of its divisors is an integer number (7205424012).

Almost surely, 2^21616272033 is an apocalyptic number.

It is an amenable number.

21616272033 is a deficient number, since it is larger than the sum of its proper divisors (7205424015).

21616272033 is an equidigital number, since it uses as much as digits as its factorization.

21616272033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7205424014.

The product of its (nonzero) digits is 18144, while the sum is 33.

The spelling of 21616272033 in words is "twenty-one billion, six hundred sixteen million, two hundred seventy-two thousand, thirty-three".