21440522311 has 16 divisors (see below), whose sum is σ = 23149776384. Its totient is φ = 19739924064.

The previous prime is 21440522309. The next prime is 21440522339. The reversal of 21440522311 is 11322504412.

It is a cyclic number.

It is not a de Polignac number, because 21440522311 - 2¹ = 21440522309 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 (21440522371) 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, 15024180 + ... + 15025606.

It is an arithmetic number, because the mean of its divisors is an integer number (1446861024).

Almost surely, 2^21440522311 is an apocalyptic number.

21440522311 is a deficient number, since it is larger than the sum of its proper divisors (1709254073).

21440522311 is a wasteful number, since it uses less digits than its factorization.

21440522311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630.

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 21440522311 in words is "twenty-one billion, four hundred forty million, five hundred twenty-two thousand, three hundred eleven".