21753347271 has 16 divisors (see below), whose sum is σ = 31424811264. Its totient is φ = 13331735424.

The previous prime is 21753347269. The next prime is 21753347281. The reversal of 21753347271 is 17274335712.

It is not a de Polignac number, because 21753347271 - 2¹ = 21753347269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21753347201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4957531 + ... + 4961916.

It is an arithmetic number, because the mean of its divisors is an integer number (1964050704).

Almost surely, 2^21753347271 is an apocalyptic number.

21753347271 is a deficient number, since it is larger than the sum of its proper divisors (9671463993).

21753347271 is a wasteful number, since it uses less digits than its factorization.

21753347271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9919510.

The product of its digits is 246960, while the sum is 42.

The spelling of 21753347271 in words is "twenty-one billion, seven hundred fifty-three million, three hundred forty-seven thousand, two hundred seventy-one".