20967913843 has 2 divisors, whose sum is σ = 20967913844. Its totient is φ = 20967913842.

The previous prime is 20967913763. The next prime is 20967913861. The reversal of 20967913843 is 34831976902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20967913843 is a prime.

It is not a weakly prime, because it can be changed into another prime (20967913643) 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, 10483956921 + 10483956922.

It is an arithmetic number, because the mean of its divisors is an integer number (10483956922).

Almost surely, 2^20967913843 is an apocalyptic number.

20967913843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20967913843 is an equidigital number, since it uses as much as digits as its factorization.

20967913843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 20967913843 in words is "twenty billion, nine hundred sixty-seven million, nine hundred thirteen thousand, eight hundred forty-three".