20453312523131 has 4 divisors (see below), whose sum is σ = 20469688275000. Its totient is φ = 20436936771264.

The previous prime is 20453312523043. The next prime is 20453312523169. The reversal of 20453312523131 is 13132521335402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20453312523131 is a prime.

It is a super-2 number, since 2×20453312523131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20453312523091 and 20453312523100.

It is not an unprimeable number, because it can be changed into a prime (20453312523731) 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, 8187874061 + ... + 8187876558.

It is an arithmetic number, because the mean of its divisors is an integer number (5117422068750).

Almost surely, 2^{20453312523131} is an apocalyptic number.

20453312523131 is a deficient number, since it is larger than the sum of its proper divisors (16375751869).

20453312523131 is a wasteful number, since it uses less digits than its factorization.

20453312523131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16375751868.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 20453312523131 its reverse (13132521335402), we get a palindrome (33585833858533).

The spelling of 20453312523131 in words is "twenty trillion, four hundred fifty-three billion, three hundred twelve million, five hundred twenty-three thousand, one hundred thirty-one".