20123253404101 has 4 divisors (see below), whose sum is σ = 20158129060492. Its totient is φ = 20088377747712.

The previous prime is 20123253404083. The next prime is 20123253404159. The reversal of 20123253404101 is 10140435232102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13119825736900 + 7003427667201 = 3622130^2 + 2646399^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123253404101 - 2¹³ = 20123253395909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123253404101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123256404101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17437827330 + ... + 17437828483.

It is an arithmetic number, because the mean of its divisors is an integer number (5039532265123).

Almost surely, 2^{20123253404101} is an apocalyptic number.

It is an amenable number.

20123253404101 is a deficient number, since it is larger than the sum of its proper divisors (34875656391).

20123253404101 is an equidigital number, since it uses as much as digits as its factorization.

20123253404101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34875656390.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20123253404101 its reverse (10140435232102), we get a palindrome (30263688636203).

The spelling of 20123253404101 in words is "twenty trillion, one hundred twenty-three billion, two hundred fifty-three million, four hundred four thousand, one hundred one".