21044023327 has 2 divisors, whose sum is σ = 21044023328. Its totient is φ = 21044023326.

The previous prime is 21044023307. The next prime is 21044023331. The reversal of 21044023327 is 72332044012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21044023327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21044023295 and 21044023304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21044023307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10522011663 + 10522011664.

It is an arithmetic number, because the mean of its divisors is an integer number (10522011664).

Almost surely, 2^21044023327 is an apocalyptic number.

21044023327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21044023327 is an equidigital number, since it uses as much as digits as its factorization.

21044023327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 21044023327 its reverse (72332044012), we get a palindrome (93376067339).

The spelling of 21044023327 in words is "twenty-one billion, forty-four million, twenty-three thousand, three hundred twenty-seven".