20252440520123 has 4 divisors (see below), whose sum is σ = 23145646308720. Its totient is φ = 17359234731528.

The previous prime is 20252440520113. The next prime is 20252440520233. The reversal of 20252440520123 is 32102504425202.

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

It is a cyclic number.

It is not a de Polignac number, because 20252440520123 - 2¹⁰ = 20252440519099 is a prime.

It is a super-2 number, since 2×20252440520123² (a number of 27 digits) contains 22 as substring.

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 20252440520123.

It is not an unprimeable number, because it can be changed into a prime (20252440520113) 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, 1446602894288 + ... + 1446602894301.

It is an arithmetic number, because the mean of its divisors is an integer number (5786411577180).

Almost surely, 2^{20252440520123} is an apocalyptic number.

20252440520123 is a deficient number, since it is larger than the sum of its proper divisors (2893205788597).

20252440520123 is an equidigital number, since it uses as much as digits as its factorization.

20252440520123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893205788596.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 20252440520123 its reverse (32102504425202), we get a palindrome (52354944945325).

The spelling of 20252440520123 in words is "twenty trillion, two hundred fifty-two billion, four hundred forty million, five hundred twenty thousand, one hundred twenty-three".