21757072333343 has 4 divisors (see below), whose sum is σ = 21870983707008. Its totient is φ = 21643160959680.

The previous prime is 21757072333277. The next prime is 21757072333357. The reversal of 21757072333343 is 34333327075712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21757072333343 - 2¹⁸ = 21757072071199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21757072333291 and 21757072333300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21757072333393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56955686546 + ... + 56955686927.

It is an arithmetic number, because the mean of its divisors is an integer number (5467745926752).

Almost surely, 2^{21757072333343} is an apocalyptic number.

21757072333343 is a deficient number, since it is larger than the sum of its proper divisors (113911373665).

21757072333343 is a wasteful number, since it uses less digits than its factorization.

21757072333343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113911373664.

The product of its (nonzero) digits is 6667920, while the sum is 50.

The spelling of 21757072333343 in words is "twenty-one trillion, seven hundred fifty-seven billion, seventy-two million, three hundred thirty-three thousand, three hundred forty-three".