20123233129 has 2 divisors, whose sum is σ = 20123233130. Its totient is φ = 20123233128.

The previous prime is 20123233111. The next prime is 20123233133. The reversal of 20123233129 is 92133232102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20121989904 + 1243225 = 141852^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123233129 - 2¹³ = 20123224937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20123233097 and 20123233106.

It is not a weakly prime, because it can be changed into another prime (20123231129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061616564 + 10061616565.

It is an arithmetic number, because the mean of its divisors is an integer number (10061616565).

Almost surely, 2^20123233129 is an apocalyptic number.

It is an amenable number.

20123233129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123233129 is an equidigital number, since it uses as much as digits as its factorization.

20123233129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 20123233129 in words is "twenty billion, one hundred twenty-three million, two hundred thirty-three thousand, one hundred twenty-nine".