21442524079 has 2 divisors, whose sum is σ = 21442524080. Its totient is φ = 21442524078.

The previous prime is 21442524011. The next prime is 21442524083. The reversal of 21442524079 is 97042524412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21442524079 - 2⁹ = 21442523567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21442525079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721262039 + 10721262040.

It is an arithmetic number, because the mean of its divisors is an integer number (10721262040).

Almost surely, 2^21442524079 is an apocalyptic number.

21442524079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442524079 is an equidigital number, since it uses as much as digits as its factorization.

21442524079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 21442524079 in words is "twenty-one billion, four hundred forty-two million, five hundred twenty-four thousand, seventy-nine".