20129120633 has 2 divisors, whose sum is σ = 20129120634. Its totient is φ = 20129120632.

The previous prime is 20129120621. The next prime is 20129120647. The reversal of 20129120633 is 33602192102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10373015104 + 9756105529 = 101848^2 + 98773^2 .

It is a cyclic number.

It is not a de Polignac number, because 20129120633 - 2⁸ = 20129120377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20129120596 and 20129120605.

It is not a weakly prime, because it can be changed into another prime (20129128633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064560316 + 10064560317.

It is an arithmetic number, because the mean of its divisors is an integer number (10064560317).

Almost surely, 2^20129120633 is an apocalyptic number.

It is an amenable number.

20129120633 is a deficient number, since it is larger than the sum of its proper divisors (1).

20129120633 is an equidigital number, since it uses as much as digits as its factorization.

20129120633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 20129120633 in words is "twenty billion, one hundred twenty-nine million, one hundred twenty thousand, six hundred thirty-three".