21741545332617 has 16 divisors (see below), whose sum is σ = 32999025328128. Its totient is φ = 12603794395280.

The previous prime is 21741545332613. The next prime is 21741545332621. The reversal of 21741545332617 is 71623354514712.

It is an interprime number because it is at equal distance from previous prime (21741545332613) and next prime (21741545332621).

It is not a de Polignac number, because 21741545332617 - 2² = 21741545332613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21741545332617.

It is not an unprimeable number, because it can be changed into a prime (21741545332613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14322492873 + ... + 14322494390.

It is an arithmetic number, because the mean of its divisors is an integer number (2062439083008).

Almost surely, 2^{21741545332617} is an apocalyptic number.

It is an amenable number.

21741545332617 is a deficient number, since it is larger than the sum of its proper divisors (11257479995511).

21741545332617 is a wasteful number, since it uses less digits than its factorization.

21741545332617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28644987300.

The product of its digits is 4233600, while the sum is 51.

The spelling of 21741545332617 in words is "twenty-one trillion, seven hundred forty-one billion, five hundred forty-five million, three hundred thirty-two thousand, six hundred seventeen".