20943662029 has 2 divisors, whose sum is σ = 20943662030. Its totient is φ = 20943662028.

The previous prime is 20943662017. The next prime is 20943662053. The reversal of 20943662029 is 92026634902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18550984804 + 2392677225 = 136202^2 + 48915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20943662029 - 2⁷ = 20943661901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20943662009) 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, 10471831014 + 10471831015.

It is an arithmetic number, because the mean of its divisors is an integer number (10471831015).

Almost surely, 2^20943662029 is an apocalyptic number.

It is an amenable number.

20943662029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20943662029 is an equidigital number, since it uses as much as digits as its factorization.

20943662029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 20943662029 in words is "twenty billion, nine hundred forty-three million, six hundred sixty-two thousand, twenty-nine".