21404617027307 has 4 divisors (see below), whose sum is σ = 21675561546720. Its totient is φ = 21133672507896.

The previous prime is 21404617027303. The next prime is 21404617027327. The reversal of 21404617027307 is 70372071640412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21404617027307 - 2² = 21404617027303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21404617027303) 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, 135472259588 + ... + 135472259745.

It is an arithmetic number, because the mean of its divisors is an integer number (5418890386680).

Almost surely, 2^{21404617027307} is an apocalyptic number.

21404617027307 is a deficient number, since it is larger than the sum of its proper divisors (270944519413).

21404617027307 is an equidigital number, since it uses as much as digits as its factorization.

21404617027307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270944519412.

The product of its (nonzero) digits is 395136, while the sum is 44.

Adding to 21404617027307 its reverse (70372071640412), we get a palindrome (91776688667719).

The spelling of 21404617027307 in words is "twenty-one trillion, four hundred four billion, six hundred seventeen million, twenty-seven thousand, three hundred seven".