21027647311 has 8 divisors (see below), whose sum is σ = 22945564800. Its totient is φ = 19110782040.

The previous prime is 21027647239. The next prime is 21027647317. The reversal of 21027647311 is 11374672012.

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 21027647311 - 2⁷ = 21027647183 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 (21027647317) 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, 220971 + ... + 301468.

It is an arithmetic number, because the mean of its divisors is an integer number (2868195600).

Almost surely, 2^21027647311 is an apocalyptic number.

21027647311 is a deficient number, since it is larger than the sum of its proper divisors (1917917489).

21027647311 is a wasteful number, since it uses less digits than its factorization.

21027647311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526109.

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 21027647311 in words is "twenty-one billion, twenty-seven million, six hundred forty-seven thousand, three hundred eleven".