21772352743 has 2 divisors, whose sum is σ = 21772352744. Its totient is φ = 21772352742.

The previous prime is 21772352717. The next prime is 21772352747. The reversal of 21772352743 is 34725327712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21772352743 - 2¹⁷ = 21772221671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21772352743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21772352747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10886176371 + 10886176372.

It is an arithmetic number, because the mean of its divisors is an integer number (10886176372).

Almost surely, 2^21772352743 is an apocalyptic number.

21772352743 is a deficient number, since it is larger than the sum of its proper divisors (1).

21772352743 is an equidigital number, since it uses as much as digits as its factorization.

21772352743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 43.

The spelling of 21772352743 in words is "twenty-one billion, seven hundred seventy-two million, three hundred fifty-two thousand, seven hundred forty-three".