20368486321 has 2 divisors, whose sum is σ = 20368486322. Its totient is φ = 20368486320.

The previous prime is 20368486297. The next prime is 20368486331. The reversal of 20368486321 is 12368486302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20306250000 + 62236321 = 142500^2 + 7889^2 .

It is a cyclic number.

It is not a de Polignac number, because 20368486321 - 2⁵ = 20368486289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20368486331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10184243160 + 10184243161.

It is an arithmetic number, because the mean of its divisors is an integer number (10184243161).

Almost surely, 2^20368486321 is an apocalyptic number.

It is an amenable number.

20368486321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20368486321 is an equidigital number, since it uses as much as digits as its factorization.

20368486321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 20368486321 in words is "twenty billion, three hundred sixty-eight million, four hundred eighty-six thousand, three hundred twenty-one".