20286031 has 2 divisors, whose sum is σ = 20286032. Its totient is φ = 20286030.

The previous prime is 20286017. The next prime is 20286073. The reversal of 20286031 is 13068202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20286031 - 2⁹ = 20285519 is a prime.

It is a super-2 number, since 2×20286031² = 823046107465922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20285993 and 20286011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20286131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10143015 + 10143016.

It is an arithmetic number, because the mean of its divisors is an integer number (10143016).

Almost surely, 2^20286031 is an apocalyptic number.

20286031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20286031 is an equidigital number, since it uses as much as digits as its factorization.

20286031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20286031 is about 4504.0016651862. The cubic root of 20286031 is about 272.7296540566.

The spelling of 20286031 in words is "twenty million, two hundred eighty-six thousand, thirty-one".