21446138039 has 2 divisors, whose sum is σ = 21446138040. Its totient is φ = 21446138038.

The previous prime is 21446138011. The next prime is 21446138047. The reversal of 21446138039 is 93083164412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21446138039 - 2¹⁶ = 21446072503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21446137987 and 21446138005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21446138059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10723069019 + 10723069020.

It is an arithmetic number, because the mean of its divisors is an integer number (10723069020).

Almost surely, 2^21446138039 is an apocalyptic number.

21446138039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21446138039 is an equidigital number, since it uses as much as digits as its factorization.

21446138039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 21446138039 in words is "twenty-one billion, four hundred forty-six million, one hundred thirty-eight thousand, thirty-nine".