20411431131 has 144 divisors (see below), whose sum is σ = 36590279040. Its totient is φ = 10057582080.

The previous prime is 20411431109. The next prime is 20411431141. The reversal of 20411431131 is 13113411402.

It is not a de Polignac number, because 20411431131 - 2⁵ = 20411431099 is a prime.

It is a super-2 number, since 2×20411431131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20411431098 and 20411431107.

It is not an unprimeable number, because it can be changed into a prime (20411431141) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 39177151 + ... + 39177671.

It is an arithmetic number, because the mean of its divisors is an integer number (254099160).

Almost surely, 2^20411431131 is an apocalyptic number.

20411431131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20411431131 is a deficient number, since it is larger than the sum of its proper divisors (16178847909).

20411431131 is a wasteful number, since it uses less digits than its factorization.

20411431131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20411431131 its reverse (13113411402), we get a palindrome (33524842533).

The spelling of 20411431131 in words is "twenty billion, four hundred eleven million, four hundred thirty-one thousand, one hundred thirty-one".