20123401253 has 2 divisors, whose sum is σ = 20123401254. Its totient is φ = 20123401252.

The previous prime is 20123401219. The next prime is 20123401283. The reversal of 20123401253 is 35210432102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18287964289 + 1835436964 = 135233^2 + 42842^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123401253 - 2¹² = 20123397157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123401213) 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, 10061700626 + 10061700627.

It is an arithmetic number, because the mean of its divisors is an integer number (10061700627).

Almost surely, 2^20123401253 is an apocalyptic number.

It is an amenable number.

20123401253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123401253 is an equidigital number, since it uses as much as digits as its factorization.

20123401253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20123401253 its reverse (35210432102), we get a palindrome (55333833355).

The spelling of 20123401253 in words is "twenty billion, one hundred twenty-three million, four hundred one thousand, two hundred fifty-three".