21460410817 has 4 divisors (see below), whose sum is σ = 21460761520. Its totient is φ = 21460060116.

The previous prime is 21460410799. The next prime is 21460410823. The reversal of 21460410817 is 71801406412.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-21460410817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21460410217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56883 + ... + 214840.

It is an arithmetic number, because the mean of its divisors is an integer number (5365190380).

Almost surely, 2^21460410817 is an apocalyptic number.

It is an amenable number.

21460410817 is a deficient number, since it is larger than the sum of its proper divisors (350703).

21460410817 is an equidigital number, since it uses as much as digits as its factorization.

21460410817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350702.

The product of its (nonzero) digits is 10752, while the sum is 34.

The spelling of 21460410817 in words is "twenty-one billion, four hundred sixty million, four hundred ten thousand, eight hundred seventeen".