21277725017 has 8 divisors (see below), whose sum is σ = 22223183424. Its totient is φ = 20333961648.

The previous prime is 21277724999. The next prime is 21277725031. The reversal of 21277725017 is 71052777212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21277725017 - 2³⁰ = 20203983193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21277725067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398063 + ... + 448340.

It is an arithmetic number, because the mean of its divisors is an integer number (2777897928).

Almost surely, 2^21277725017 is an apocalyptic number.

It is an amenable number.

21277725017 is a deficient number, since it is larger than the sum of its proper divisors (945458407).

21277725017 is a wasteful number, since it uses less digits than its factorization.

21277725017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847519.

The product of its (nonzero) digits is 96040, while the sum is 41.

The spelling of 21277725017 in words is "twenty-one billion, two hundred seventy-seven million, seven hundred twenty-five thousand, seventeen".