21377875039 has 2 divisors, whose sum is σ = 21377875040. Its totient is φ = 21377875038.

The previous prime is 21377875033. The next prime is 21377875087. The reversal of 21377875039 is 93057877312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21377875039 - 2³ = 21377875031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21377875031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10688937519 + 10688937520.

It is an arithmetic number, because the mean of its divisors is an integer number (10688937520).

Almost surely, 2^21377875039 is an apocalyptic number.

21377875039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21377875039 is an equidigital number, since it uses as much as digits as its factorization.

21377875039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 21377875039 in words is "twenty-one billion, three hundred seventy-seven million, eight hundred seventy-five thousand, thirty-nine".