20070971 has 2 divisors, whose sum is σ = 20070972. Its totient is φ = 20070970.

The previous prime is 20070961. The next prime is 20070979. The reversal of 20070971 is 17907002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20070971 - 2⁶ = 20070907 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20070971.

It is not a weakly prime, because it can be changed into another prime (20070979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035485 + 10035486.

It is an arithmetic number, because the mean of its divisors is an integer number (10035486).

Almost surely, 2^20070971 is an apocalyptic number.

20070971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20070971 is an equidigital number, since it uses as much as digits as its factorization.

20070971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 20070971 is about 4480.0637272253. The cubic root of 20070971 is about 271.7624575108.

Adding to 20070971 its reverse (17907002), we get a palindrome (37977973).

The spelling of 20070971 in words is "twenty million, seventy thousand, nine hundred seventy-one".