20793189121 has 2 divisors, whose sum is σ = 20793189122. Its totient is φ = 20793189120.

The previous prime is 20793189061. The next prime is 20793189143. The reversal of 20793189121 is 12198139702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20724481600 + 68707521 = 143960^2 + 8289^2 .

It is a cyclic number.

It is not a de Polignac number, because 20793189121 - 2⁹ = 20793188609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20793189161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10396594560 + 10396594561.

It is an arithmetic number, because the mean of its divisors is an integer number (10396594561).

Almost surely, 2^20793189121 is an apocalyptic number.

It is an amenable number.

20793189121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20793189121 is an equidigital number, since it uses as much as digits as its factorization.

20793189121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 20793189121 in words is "twenty billion, seven hundred ninety-three million, one hundred eighty-nine thousand, one hundred twenty-one".