21411027617 has 4 divisors (see below), whose sum is σ = 24469745856. Its totient is φ = 18352309380.

The previous prime is 21411027581. The next prime is 21411027623. The reversal of 21411027617 is 71672011412.

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 21411027617 - 2⁸ = 21411027361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21411027217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529359109 + ... + 1529359122.

It is an arithmetic number, because the mean of its divisors is an integer number (6117436464).

Almost surely, 2^21411027617 is an apocalyptic number.

It is an amenable number.

21411027617 is a deficient number, since it is larger than the sum of its proper divisors (3058718239).

21411027617 is an equidigital number, since it uses as much as digits as its factorization.

21411027617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058718238.

The product of its (nonzero) digits is 4704, while the sum is 32.

The spelling of 21411027617 in words is "twenty-one billion, four hundred eleven million, twenty-seven thousand, six hundred seventeen".