20213071 has 2 divisors, whose sum is σ = 20213072. Its totient is φ = 20213070.

The previous prime is 20213059. The next prime is 20213099. The reversal of 20213071 is 17031202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20213071 - 2⁹ = 20212559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106535 + 10106536.

It is an arithmetic number, because the mean of its divisors is an integer number (10106536).

Almost surely, 2^20213071 is an apocalyptic number.

20213071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213071 is an equidigital number, since it uses as much as digits as its factorization.

20213071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20213071 is about 4495.8949053553. The cubic root of 20213071 is about 272.4022981112.

Adding to 20213071 its reverse (17031202), we get a palindrome (37244273).

The spelling of 20213071 in words is "twenty million, two hundred thirteen thousand, seventy-one".