21939083775077 has 12 divisors (see below), whose sum is σ = 26063974474560. Its totient is φ = 18404824076856.

The previous prime is 21939083775043. The next prime is 21939083775151. The reversal of 21939083775077 is 77057738093912.

It is not a de Polignac number, because 21939083775077 - 2⁶ = 21939083775013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21939083774998 and 21939083775016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21939083775377) 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 in 11 ways as a sum of consecutive naturals, for example, 4763150927 + ... + 4763155532.

It is an arithmetic number, because the mean of its divisors is an integer number (2171997872880).

Almost surely, 2^{21939083775077} is an apocalyptic number.

It is an amenable number.

21939083775077 is a deficient number, since it is larger than the sum of its proper divisors (4124890699483).

21939083775077 is an equidigital number, since it uses as much as digits as its factorization.

21939083775077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526306520 (or 9526306513 counting only the distinct ones).

The product of its (nonzero) digits is 140026320, while the sum is 68.

The spelling of 21939083775077 in words is "twenty-one trillion, nine hundred thirty-nine billion, eighty-three million, seven hundred seventy-five thousand, seventy-seven".