21377613743 has 2 divisors, whose sum is σ = 21377613744. Its totient is φ = 21377613742.

The previous prime is 21377613667. The next prime is 21377613749. The reversal of 21377613743 is 34731677312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21377613743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21377613694 and 21377613703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21377613749) 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, 10688806871 + 10688806872.

It is an arithmetic number, because the mean of its divisors is an integer number (10688806872).

Almost surely, 2^21377613743 is an apocalyptic number.

21377613743 is a deficient number, since it is larger than the sum of its proper divisors (1).

21377613743 is an equidigital number, since it uses as much as digits as its factorization.

21377613743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 44.

The spelling of 21377613743 in words is "twenty-one billion, three hundred seventy-seven million, six hundred thirteen thousand, seven hundred forty-three".