20975167123 has 2 divisors, whose sum is σ = 20975167124. Its totient is φ = 20975167122.

The previous prime is 20975167117. The next prime is 20975167151. The reversal of 20975167123 is 32176157902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20975167123 - 2¹³ = 20975158931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20975167123.

It is not a weakly prime, because it can be changed into another prime (20975167523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10487583561 + 10487583562.

It is an arithmetic number, because the mean of its divisors is an integer number (10487583562).

Almost surely, 2^20975167123 is an apocalyptic number.

20975167123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20975167123 is an equidigital number, since it uses as much as digits as its factorization.

20975167123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 20975167123 in words is "twenty billion, nine hundred seventy-five million, one hundred sixty-seven thousand, one hundred twenty-three".