21755734233043 has 2 divisors, whose sum is σ = 21755734233044. Its totient is φ = 21755734233042.

The previous prime is 21755734233029. The next prime is 21755734233067. The reversal of 21755734233043 is 34033243755712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21755734233043 is a prime.

It is not a weakly prime, because it can be changed into another prime (21755734273043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10877867116521 + 10877867116522.

It is an arithmetic number, because the mean of its divisors is an integer number (10877867116522).

Almost surely, 2^{21755734233043} is an apocalyptic number.

21755734233043 is a deficient number, since it is larger than the sum of its proper divisors (1).

21755734233043 is an equidigital number, since it uses as much as digits as its factorization.

21755734233043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6350400, while the sum is 49.

Adding to 21755734233043 its reverse (34033243755712), we get a palindrome (55788977988755).

The spelling of 21755734233043 in words is "twenty-one trillion, seven hundred fifty-five billion, seven hundred thirty-four million, two hundred thirty-three thousand, forty-three".