20443101131 has 2 divisors, whose sum is σ = 20443101132. Its totient is φ = 20443101130.

The previous prime is 20443101127. The next prime is 20443101149. The reversal of 20443101131 is 13110134402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20443101131 - 2² = 20443101127 is a prime.

It is a super-2 number, since 2×20443101131² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20443101181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221550565 + 10221550566.

It is an arithmetic number, because the mean of its divisors is an integer number (10221550566).

Almost surely, 2^20443101131 is an apocalyptic number.

20443101131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443101131 is an equidigital number, since it uses as much as digits as its factorization.

20443101131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20443101131 its reverse (13110134402), we get a palindrome (33553235533).

The spelling of 20443101131 in words is "twenty billion, four hundred forty-three million, one hundred one thousand, one hundred thirty-one".