20123420033 has 2 divisors, whose sum is σ = 20123420034. Its totient is φ = 20123420032.

The previous prime is 20123420003. The next prime is 20123420071. The reversal of 20123420033 is 33002432102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14531820304 + 5591599729 = 120548^2 + 74777^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123420033 - 2⁸ = 20123419777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20123419987 and 20123420014.

It is not a weakly prime, because it can be changed into another prime (20123420003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061710016 + 10061710017.

It is an arithmetic number, because the mean of its divisors is an integer number (10061710017).

Almost surely, 2^20123420033 is an apocalyptic number.

It is an amenable number.

20123420033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123420033 is an equidigital number, since it uses as much as digits as its factorization.

20123420033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20123420033 its reverse (33002432102), we get a palindrome (53125852135).

The spelling of 20123420033 in words is "twenty billion, one hundred twenty-three million, four hundred twenty thousand, thirty-three".