16820232131 has 2 divisors, whose sum is σ = 16820232132. Its totient is φ = 16820232130.

The previous prime is 16820232119. The next prime is 16820232139. The reversal of 16820232131 is 13123202861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16820232131 - 2¹⁰ = 16820231107 is a prime.

It is a super-2 number, since 2×16820232131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16820232094 and 16820232103.

It is not a weakly prime, because it can be changed into another prime (16820232139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8410116065 + 8410116066.

It is an arithmetic number, because the mean of its divisors is an integer number (8410116066).

Almost surely, 2^16820232131 is an apocalyptic number.

16820232131 is a deficient number, since it is larger than the sum of its proper divisors (1).

16820232131 is an equidigital number, since it uses as much as digits as its factorization.

16820232131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 16820232131 its reverse (13123202861), we get a palindrome (29943434992).

The spelling of 16820232131 in words is "sixteen billion, eight hundred twenty million, two hundred thirty-two thousand, one hundred thirty-one".