20998316363 has 2 divisors, whose sum is σ = 20998316364. Its totient is φ = 20998316362.

The previous prime is 20998316359. The next prime is 20998316389. The reversal of 20998316363 is 36361389902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20998316363 - 2² = 20998316359 is a prime.

It is not a weakly prime, because it can be changed into another prime (20998316863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10499158181 + 10499158182.

It is an arithmetic number, because the mean of its divisors is an integer number (10499158182).

Almost surely, 2^20998316363 is an apocalyptic number.

20998316363 is a deficient number, since it is larger than the sum of its proper divisors (1).

20998316363 is an equidigital number, since it uses as much as digits as its factorization.

20998316363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 20998316363 in words is "twenty billion, nine hundred ninety-eight million, three hundred sixteen thousand, three hundred sixty-three".