20012100079 has 2 divisors, whose sum is σ = 20012100080. Its totient is φ = 20012100078.

The previous prime is 20012100019. The next prime is 20012100133. The reversal of 20012100079 is 97000121002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012100079 - 2⁹ = 20012099567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012100019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006050039 + 10006050040.

It is an arithmetic number, because the mean of its divisors is an integer number (10006050040).

Almost surely, 2^20012100079 is an apocalyptic number.

20012100079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012100079 is an equidigital number, since it uses as much as digits as its factorization.

20012100079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The spelling of 20012100079 in words is "twenty billion, twelve million, one hundred thousand, seventy-nine".