20080031 has 2 divisors, whose sum is σ = 20080032. Its totient is φ = 20080030.

The previous prime is 20080003. The next prime is 20080069. The reversal of 20080031 is 13008002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20080031 is a prime.

It is a super-2 number, since 2×20080031² = 806415289921922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20079988 and 20080015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20080231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10040015 + 10040016.

It is an arithmetic number, because the mean of its divisors is an integer number (10040016).

Almost surely, 2^20080031 is an apocalyptic number.

20080031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20080031 is an equidigital number, since it uses as much as digits as its factorization.

20080031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20080031 is about 4481.0747594746. The cubic root of 20080031 is about 271.8033423868.

Adding to 20080031 its reverse (13008002), we get a palindrome (33088033).

The spelling of 20080031 in words is "twenty million, eighty thousand, thirty-one".