20004031 has 2 divisors, whose sum is σ = 20004032. Its totient is φ = 20004030.

The previous prime is 20004011. The next prime is 20004041. The reversal of 20004031 is 13040002.

It is an a-pointer prime, because the next prime (20004041) can be obtained adding 20004031 to its sum of digits (10).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20004031 - 2¹¹ = 20001983 is a prime.

It is a super-2 number, since 2×20004031² = 800322512497922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20003999 and 20004017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20004001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002015 + 10002016.

It is an arithmetic number, because the mean of its divisors is an integer number (10002016).

Almost surely, 2^20004031 is an apocalyptic number.

20004031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004031 is an equidigital number, since it uses as much as digits as its factorization.

20004031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20004031 is about 4472.5866117941. The cubic root of 20004031 is about 271.4599967968.

Adding to 20004031 its reverse (13040002), we get a palindrome (33044033).

The spelling of 20004031 in words is "twenty million, four thousand, thirty-one".