43344626021 has 2 divisors, whose sum is σ = 43344626022. Its totient is φ = 43344626020.

The previous prime is 43344625999. The next prime is 43344626027. The reversal of 43344626021 is 12062644334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36772281121 + 6572344900 = 191761^2 + 81070^2 .

It is a cyclic number.

It is not a de Polignac number, because 43344626021 - 2¹⁸ = 43344363877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43344626027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21672313010 + 21672313011.

It is an arithmetic number, because the mean of its divisors is an integer number (21672313011).

Almost surely, 2^43344626021 is an apocalyptic number.

It is an amenable number.

43344626021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43344626021 is an equidigital number, since it uses as much as digits as its factorization.

43344626021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 43344626021 in words is "forty-three billion, three hundred forty-four million, six hundred twenty-six thousand, twenty-one".