21549414265 has 16 divisors (see below), whose sum is σ = 27235813248. Its totient is φ = 16335865216.

The previous prime is 21549414241. The next prime is 21549414329. The reversal of 21549414265 is 56241494512.

It is a cyclic number.

It is not a de Polignac number, because 21549414265 - 2⁵ = 21549414233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 863332 + ... + 887941.

It is an arithmetic number, because the mean of its divisors is an integer number (1702238328).

Almost surely, 2^21549414265 is an apocalyptic number.

It is an amenable number.

21549414265 is a deficient number, since it is larger than the sum of its proper divisors (5686398983).

21549414265 is a wasteful number, since it uses less digits than its factorization.

21549414265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751408.

The product of its digits is 345600, while the sum is 43.

The spelling of 21549414265 in words is "twenty-one billion, five hundred forty-nine million, four hundred fourteen thousand, two hundred sixty-five".