20968316933 has 2 divisors, whose sum is σ = 20968316934. Its totient is φ = 20968316932.

The previous prime is 20968316927. The next prime is 20968316947. The reversal of 20968316933 is 33961386902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20885452324 + 82864609 = 144518^2 + 9103^2 .

It is a cyclic number.

It is not a de Polignac number, because 20968316933 - 2¹⁰ = 20968315909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20968316923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10484158466 + 10484158467.

It is an arithmetic number, because the mean of its divisors is an integer number (10484158467).

Almost surely, 2^20968316933 is an apocalyptic number.

It is an amenable number.

20968316933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20968316933 is an equidigital number, since it uses as much as digits as its factorization.

20968316933 is an evil number, because the sum of its binary digits is even.

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

The spelling of 20968316933 in words is "twenty billion, nine hundred sixty-eight million, three hundred sixteen thousand, nine hundred thirty-three".