20965950461639 has 2 divisors, whose sum is σ = 20965950461640. Its totient is φ = 20965950461638.

The previous prime is 20965950461597. The next prime is 20965950461671. The reversal of 20965950461639 is 93616405956902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20965950461639 - 2²⁰ = 20965949413063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20965950461699) 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, 10482975230819 + 10482975230820.

It is an arithmetic number, because the mean of its divisors is an integer number (10482975230820).

Almost surely, 2^{20965950461639} is an apocalyptic number.

20965950461639 is a deficient number, since it is larger than the sum of its proper divisors (1).

20965950461639 is an equidigital number, since it uses as much as digits as its factorization.

20965950461639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94478400, while the sum is 65.

The spelling of 20965950461639 in words is "twenty trillion, nine hundred sixty-five billion, nine hundred fifty million, four hundred sixty-one thousand, six hundred thirty-nine".