21364466271 has 16 divisors (see below), whose sum is σ = 28689141984. Its totient is φ = 14141522304.

The previous prime is 21364466197. The next prime is 21364466281. The reversal of 21364466271 is 17266446312.

It is a happy number.

It is not a de Polignac number, because 21364466271 - 2¹⁹ = 21363941983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364466281) 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, 630165 + ... + 663201.

It is an arithmetic number, because the mean of its divisors is an integer number (1793071374).

Almost surely, 2^21364466271 is an apocalyptic number.

21364466271 is a deficient number, since it is larger than the sum of its proper divisors (7324675713).

21364466271 is a wasteful number, since it uses less digits than its factorization.

21364466271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34570.

The product of its digits is 290304, while the sum is 42.

The spelling of 21364466271 in words is "twenty-one billion, three hundred sixty-four million, four hundred sixty-six thousand, two hundred seventy-one".