20089031 has 2 divisors, whose sum is σ = 20089032. Its totient is φ = 20089030.

The previous prime is 20089007. The next prime is 20089033. The reversal of 20089031 is 13098002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20089031 is a prime.

It is a super-2 number, since 2×20089031² = 807138333037922, which contains 22 as substring.

Together with 20089033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20088988 and 20089006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20089033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10044515 + 10044516.

It is an arithmetic number, because the mean of its divisors is an integer number (10044516).

Almost surely, 2^20089031 is an apocalyptic number.

20089031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20089031 is an equidigital number, since it uses as much as digits as its factorization.

20089031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20089031 is about 4482.0788703458. The cubic root of 20089031 is about 271.8439443278.

The spelling of 20089031 in words is "twenty million, eighty-nine thousand, thirty-one".