20030071 has 2 divisors, whose sum is σ = 20030072. Its totient is φ = 20030070.

The previous prime is 20030069. The next prime is 20030081. The reversal of 20030071 is 17003002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20030071 - 2¹ = 20030069 is a prime.

Together with 20030069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20030011) 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, 10015035 + 10015036.

It is an arithmetic number, because the mean of its divisors is an integer number (10015036).

Almost surely, 2^20030071 is an apocalyptic number.

20030071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030071 is an equidigital number, since it uses as much as digits as its factorization.

20030071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 20030071 is about 4475.4967322075. The cubic root of 20030071 is about 271.5777356213.

Adding to 20030071 its reverse (17003002), we get a palindrome (37033073).

The spelling of 20030071 in words is "twenty million, thirty thousand, seventy-one".