16820232031 has 2 divisors, whose sum is σ = 16820232032. Its totient is φ = 16820232030.

The previous prime is 16820231983. The next prime is 16820232047. The reversal of 16820232031 is 13023202861.

It is a strong prime.

It is an emirp because it is prime and its reverse (13023202861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16820232031 - 2¹¹ = 16820229983 is a prime.

It is a super-2 number, since 2×16820232031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16820232131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8410116015 + 8410116016.

It is an arithmetic number, because the mean of its divisors is an integer number (8410116016).

Almost surely, 2^16820232031 is an apocalyptic number.

16820232031 is a deficient number, since it is larger than the sum of its proper divisors (1).

16820232031 is an equidigital number, since it uses as much as digits as its factorization.

16820232031 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 28.

Adding to 16820232031 its reverse (13023202861), we get a palindrome (29843434892).

The spelling of 16820232031 in words is "sixteen billion, eight hundred twenty million, two hundred thirty-two thousand, thirty-one".