21376765407383 has 2 divisors, whose sum is σ = 21376765407384. Its totient is φ = 21376765407382.

The previous prime is 21376765407377. The next prime is 21376765407397. The reversal of 21376765407383 is 38370456767312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21376765407383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21376765407583) 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, 10688382703691 + 10688382703692.

It is an arithmetic number, because the mean of its divisors is an integer number (10688382703692).

Almost surely, 2^{21376765407383} is an apocalyptic number.

21376765407383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21376765407383 is an equidigital number, since it uses as much as digits as its factorization.

21376765407383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 106686720, while the sum is 62.

The spelling of 21376765407383 in words is "twenty-one trillion, three hundred seventy-six billion, seven hundred sixty-five million, four hundred seven thousand, three hundred eighty-three".