20205371 has 2 divisors, whose sum is σ = 20205372. Its totient is φ = 20205370.

The previous prime is 20205343. The next prime is 20205377. The reversal of 20205371 is 17350202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20205371 - 2⁶ = 20205307 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20205377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102685 + 10102686.

It is an arithmetic number, because the mean of its divisors is an integer number (10102686).

Almost surely, 2^20205371 is an apocalyptic number.

20205371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20205371 is an equidigital number, since it uses as much as digits as its factorization.

20205371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20205371 is about 4495.0384870432. The cubic root of 20205371 is about 272.3677039272.

Adding to 20205371 its reverse (17350202), we get a palindrome (37555573).

The spelling of 20205371 in words is "twenty million, two hundred five thousand, three hundred seventy-one".