20102012089 has 2 divisors, whose sum is σ = 20102012090. Its totient is φ = 20102012088.

The previous prime is 20102012081. The next prime is 20102012129. The reversal of 20102012089 is 98021020102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16882584489 + 3219427600 = 129933^2 + 56740^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102012089 - 2³ = 20102012081 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102012081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051006044 + 10051006045.

It is an arithmetic number, because the mean of its divisors is an integer number (10051006045).

Almost surely, 2^20102012089 is an apocalyptic number.

It is an amenable number.

20102012089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102012089 is an equidigital number, since it uses as much as digits as its factorization.

20102012089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 20102012089 in words is "twenty billion, one hundred two million, twelve thousand, eighty-nine".