20531031130 has 16 divisors (see below), whose sum is σ = 37423653120. Its totient is φ = 8108457552.

The previous prime is 20531031119. The next prime is 20531031173. The reversal of 20531031130 is 3113013502.

It is a super-2 number, since 2×20531031130² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20531031098 and 20531031107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12993534 + ... + 12995113.

It is an arithmetic number, because the mean of its divisors is an integer number (2338978320).

Almost surely, 2^20531031130 is an apocalyptic number.

20531031130 is a deficient number, since it is larger than the sum of its proper divisors (16892621990).

20531031130 is a wasteful number, since it uses less digits than its factorization.

20531031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25988733.

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 20531031130 its reverse (3113013502), we get a palindrome (23644044632).

The spelling of 20531031130 in words is "twenty billion, five hundred thirty-one million, thirty-one thousand, one hundred thirty".