20001123253 has 2 divisors, whose sum is σ = 20001123254. Its totient is φ = 20001123252.

The previous prime is 20001123229. The next prime is 20001123257. The reversal of 20001123253 is 35232110002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13666077604 + 6335045649 = 116902^2 + 79593^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001123253 - 2⁵ = 20001123221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001123253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001123257) 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, 10000561626 + 10000561627.

It is an arithmetic number, because the mean of its divisors is an integer number (10000561627).

Almost surely, 2^20001123253 is an apocalyptic number.

It is an amenable number.

20001123253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001123253 is an equidigital number, since it uses as much as digits as its factorization.

20001123253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 20001123253 its reverse (35232110002), we get a palindrome (55233233255).

The spelling of 20001123253 in words is "twenty billion, one million, one hundred twenty-three thousand, two hundred fifty-three".