20443401131 has 4 divisors (see below), whose sum is σ = 20468121912. Its totient is φ = 20418680352.

The previous prime is 20443401067. The next prime is 20443401149. The reversal of 20443401131 is 13110434402.

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 20443401131 - 2⁶ = 20443401067 is a prime.

It is a super-2 number, since 2×20443401131² (a number of 21 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 = 20443401097 and 20443401106.

It is not an unprimeable number, because it can be changed into a prime (20443401191) 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, 12359150 + ... + 12360803.

It is an arithmetic number, because the mean of its divisors is an integer number (5117030478).

Almost surely, 2^20443401131 is an apocalyptic number.

20443401131 is a deficient number, since it is larger than the sum of its proper divisors (24720781).

20443401131 is an equidigital number, since it uses as much as digits as its factorization.

20443401131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24720780.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20443401131 its reverse (13110434402), we get a palindrome (33553835533).

The spelling of 20443401131 in words is "twenty billion, four hundred forty-three million, four hundred one thousand, one hundred thirty-one".