21134031439 has 2 divisors, whose sum is σ = 21134031440. Its totient is φ = 21134031438.

The previous prime is 21134031383. The next prime is 21134031449. The reversal of 21134031439 is 93413043112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21134031439 - 2¹¹ = 21134029391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21134031439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21134031449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10567015719 + 10567015720.

It is an arithmetic number, because the mean of its divisors is an integer number (10567015720).

Almost surely, 2^21134031439 is an apocalyptic number.

21134031439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134031439 is an equidigital number, since it uses as much as digits as its factorization.

21134031439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 21134031439 in words is "twenty-one billion, one hundred thirty-four million, thirty-one thousand, four hundred thirty-nine".