20450223551131 has 16 divisors (see below), whose sum is σ = 23302106650368. Its totient is φ = 17765385818400.

The previous prime is 20450223551119. The next prime is 20450223551171. The reversal of 20450223551131 is 13115532205402.

It is not a de Polignac number, because 20450223551131 - 2⁷ = 20450223551003 is a prime.

It is a super-2 number, since 2×20450223551131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20450223551171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39325881 + ... + 39842506.

It is an arithmetic number, because the mean of its divisors is an integer number (1456381665648).

Almost surely, 2^{20450223551131} is an apocalyptic number.

20450223551131 is a deficient number, since it is larger than the sum of its proper divisors (2851883099237).

20450223551131 is a wasteful number, since it uses less digits than its factorization.

20450223551131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79169442.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 20450223551131 its reverse (13115532205402), we get a palindrome (33565755756533).

The spelling of 20450223551131 in words is "twenty trillion, four hundred fifty billion, two hundred twenty-three million, five hundred fifty-one thousand, one hundred thirty-one".