20321722093 has 2 divisors, whose sum is σ = 20321722094. Its totient is φ = 20321722092.

The previous prime is 20321722081. The next prime is 20321722103. The reversal of 20321722093 is 39022712302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16266961764 + 4054760329 = 127542^2 + 63677^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321722093 - 2¹⁷ = 20321591021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321722493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160861046 + 10160861047.

It is an arithmetic number, because the mean of its divisors is an integer number (10160861047).

Almost surely, 2^20321722093 is an apocalyptic number.

It is an amenable number.

20321722093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321722093 is an equidigital number, since it uses as much as digits as its factorization.

20321722093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The spelling of 20321722093 in words is "twenty billion, three hundred twenty-one million, seven hundred twenty-two thousand, ninety-three".