20873351421779 has 2 divisors, whose sum is σ = 20873351421780. Its totient is φ = 20873351421778.

The previous prime is 20873351421757. The next prime is 20873351421869. The reversal of 20873351421779 is 97712415337802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20873351421779 - 2³⁶ = 20804631945043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20873351426779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10436675710889 + 10436675710890.

It is an arithmetic number, because the mean of its divisors is an integer number (10436675710890).

Almost surely, 2^{20873351421779} is an apocalyptic number.

20873351421779 is a deficient number, since it is larger than the sum of its proper divisors (1).

20873351421779 is an equidigital number, since it uses as much as digits as its factorization.

20873351421779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 20873351421779 in words is "twenty trillion, eight hundred seventy-three billion, three hundred fifty-one million, four hundred twenty-one thousand, seven hundred seventy-nine".