20271061 has 2 divisors, whose sum is σ = 20271062. Its totient is φ = 20271060.

The previous prime is 20271049. The next prime is 20271091. The reversal of 20271061 is 16017202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 4223025 = 4006^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 20271061 - 2¹⁹ = 19746773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20271091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10135530 + 10135531.

It is an arithmetic number, because the mean of its divisors is an integer number (10135531).

Almost surely, 2^20271061 is an apocalyptic number.

It is an amenable number.

20271061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20271061 is an equidigital number, since it uses as much as digits as its factorization.

20271061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 20271061 is about 4502.3395029695. The cubic root of 20271061 is about 272.6625509415.

Adding to 20271061 its reverse (16017202), we get a palindrome (36288263).

The spelling of 20271061 in words is "twenty million, two hundred seventy-one thousand, sixty-one".