20123475846779 has 2 divisors, whose sum is σ = 20123475846780. Its totient is φ = 20123475846778.

The previous prime is 20123475846713. The next prime is 20123475846827. The reversal of 20123475846779 is 97764857432102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20123475846779 - 2¹⁶ = 20123475781243 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123475846709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061737923389 + 10061737923390.

It is an arithmetic number, because the mean of its divisors is an integer number (10061737923390).

It is a 1-persistent number, because it is pandigital, but 2⋅20123475846779 = 40246951693558 is not.

Almost surely, 2^{20123475846779} is an apocalyptic number.

20123475846779 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123475846779 is an equidigital number, since it uses as much as digits as its factorization.

20123475846779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142248960, while the sum is 65.

The spelling of 20123475846779 in words is "twenty trillion, one hundred twenty-three billion, four hundred seventy-five million, eight hundred forty-six thousand, seven hundred seventy-nine".