20523105079 has 2 divisors, whose sum is σ = 20523105080. Its totient is φ = 20523105078.

The previous prime is 20523105077. The next prime is 20523105133. The reversal of 20523105079 is 97050132502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20523105079 - 2¹ = 20523105077 is a prime.

Together with 20523105077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20523105077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261552539 + 10261552540.

It is an arithmetic number, because the mean of its divisors is an integer number (10261552540).

Almost surely, 2^20523105079 is an apocalyptic number.

20523105079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523105079 is an equidigital number, since it uses as much as digits as its factorization.

20523105079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The spelling of 20523105079 in words is "twenty billion, five hundred twenty-three million, one hundred five thousand, seventy-nine".