21275139383 has 2 divisors, whose sum is σ = 21275139384. Its totient is φ = 21275139382.

The previous prime is 21275139377. The next prime is 21275139409. The reversal of 21275139383 is 38393157212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21275139383 - 2⁴ = 21275139367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21275139323) 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, 10637569691 + 10637569692.

It is an arithmetic number, because the mean of its divisors is an integer number (10637569692).

Almost surely, 2^21275139383 is an apocalyptic number.

21275139383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21275139383 is an equidigital number, since it uses as much as digits as its factorization.

21275139383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The spelling of 21275139383 in words is "twenty-one billion, two hundred seventy-five million, one hundred thirty-nine thousand, three hundred eighty-three".