20623643129 has 2 divisors, whose sum is σ = 20623643130. Its totient is φ = 20623643128.

The previous prime is 20623643111. The next prime is 20623643153. The reversal of 20623643129 is 92134632602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20206053904 + 417589225 = 142148^2 + 20435^2 .

It is a cyclic number.

It is not a de Polignac number, because 20623643129 - 2¹² = 20623639033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20623643092 and 20623643101.

It is not a weakly prime, because it can be changed into another prime (20623643329) 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, 10311821564 + 10311821565.

It is an arithmetic number, because the mean of its divisors is an integer number (10311821565).

Almost surely, 2^20623643129 is an apocalyptic number.

It is an amenable number.

20623643129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20623643129 is an equidigital number, since it uses as much as digits as its factorization.

20623643129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 20623643129 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, one hundred twenty-nine".