20522344993 has 2 divisors, whose sum is σ = 20522344994. Its totient is φ = 20522344992.

The previous prime is 20522344981. The next prime is 20522345017. The reversal of 20522344993 is 39944322502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20511109089 + 11235904 = 143217^2 + 3352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20522344993 is a prime.

It is not a weakly prime, because it can be changed into another prime (20522344933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261172496 + 10261172497.

It is an arithmetic number, because the mean of its divisors is an integer number (10261172497).

Almost surely, 2^20522344993 is an apocalyptic number.

It is an amenable number.

20522344993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20522344993 is an equidigital number, since it uses as much as digits as its factorization.

20522344993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 20522344993 in words is "twenty billion, five hundred twenty-two million, three hundred forty-four thousand, nine hundred ninety-three".