21527827311 has 16 divisors (see below), whose sum is σ = 30907353600. Its totient is φ = 13278711168.

The previous prime is 21527827303. The next prime is 21527827337. The reversal of 21527827311 is 11372872512.

It is not a de Polignac number, because 21527827311 - 2³ = 21527827303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21527827311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21527827351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3574231 + ... + 3580248.

It is an arithmetic number, because the mean of its divisors is an integer number (1931709600).

Almost surely, 2^21527827311 is an apocalyptic number.

21527827311 is a deficient number, since it is larger than the sum of its proper divisors (9379526289).

21527827311 is a wasteful number, since it uses less digits than its factorization.

21527827311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154558.

The product of its digits is 47040, while the sum is 39.

The spelling of 21527827311 in words is "twenty-one billion, five hundred twenty-seven million, eight hundred twenty-seven thousand, three hundred eleven".