20120071 has 2 divisors, whose sum is σ = 20120072. Its totient is φ = 20120070.

The previous prime is 20120063. The next prime is 20120081. The reversal of 20120071 is 17002102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20120071 - 2³ = 20120063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060035 + 10060036.

It is an arithmetic number, because the mean of its divisors is an integer number (10060036).

Almost surely, 2^20120071 is an apocalyptic number.

20120071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120071 is an equidigital number, since it uses as much as digits as its factorization.

20120071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 20120071 is about 4485.5402127280. The cubic root of 20120071 is about 271.9838829478.

Adding to 20120071 its reverse (17002102), we get a palindrome (37122173).

The spelling of 20120071 in words is "twenty million, one hundred twenty thousand, seventy-one".