20401440131 has 2 divisors, whose sum is σ = 20401440132. Its totient is φ = 20401440130.

The previous prime is 20401440119. The next prime is 20401440161. The reversal of 20401440131 is 13104410402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20401440131 is a prime.

It is a super-2 number, since 2×20401440131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20401440161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200720065 + 10200720066.

It is an arithmetic number, because the mean of its divisors is an integer number (10200720066).

Almost surely, 2^20401440131 is an apocalyptic number.

20401440131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401440131 is an equidigital number, since it uses as much as digits as its factorization.

20401440131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20401440131 its reverse (13104410402), we get a palindrome (33505850533).

The spelling of 20401440131 in words is "twenty billion, four hundred one million, four hundred forty thousand, one hundred thirty-one".