20970391363 has 2 divisors, whose sum is σ = 20970391364. Its totient is φ = 20970391362.

The previous prime is 20970391301. The next prime is 20970391369. The reversal of 20970391363 is 36319307902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20970391363 is a prime.

It is not a weakly prime, because it can be changed into another prime (20970391369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10485195681 + 10485195682.

It is an arithmetic number, because the mean of its divisors is an integer number (10485195682).

Almost surely, 2^20970391363 is an apocalyptic number.

20970391363 is a deficient number, since it is larger than the sum of its proper divisors (1).

20970391363 is an equidigital number, since it uses as much as digits as its factorization.

20970391363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 43.

The spelling of 20970391363 in words is "twenty billion, nine hundred seventy million, three hundred ninety-one thousand, three hundred sixty-three".