21404127002317 has 4 divisors (see below), whose sum is σ = 21404350740256. Its totient is φ = 21403903264380.

The previous prime is 21404127002309. The next prime is 21404127002417. The reversal of 21404127002317 is 71320072140412.

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 21404127002317 - 2³ = 21404127002309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404127002417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111725409 + ... + 111916822.

It is an arithmetic number, because the mean of its divisors is an integer number (5351087685064).

Almost surely, 2^{21404127002317} is an apocalyptic number.

It is an amenable number.

21404127002317 is a deficient number, since it is larger than the sum of its proper divisors (223737939).

21404127002317 is an equidigital number, since it uses as much as digits as its factorization.

21404127002317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223737938.

The product of its (nonzero) digits is 18816, while the sum is 34.

Adding to 21404127002317 its reverse (71320072140412), we get a palindrome (92724199142729).

The spelling of 21404127002317 in words is "twenty-one trillion, four hundred four billion, one hundred twenty-seven million, two thousand, three hundred seventeen".