20310089 has 2 divisors, whose sum is σ = 20310090. Its totient is φ = 20310088.

The previous prime is 20310049. The next prime is 20310091. The reversal of 20310089 is 98001302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14100025 + 6210064 = 3755^2 + 2492^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310089 - 2⁸ = 20309833 is a prime.

Together with 20310091, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1289021 and since 20310089 and 1289021 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20310029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155044 + 10155045.

It is an arithmetic number, because the mean of its divisors is an integer number (10155045).

Almost surely, 2^20310089 is an apocalyptic number.

It is an amenable number.

20310089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310089 is an equidigital number, since it uses as much as digits as its factorization.

20310089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20310089 is about 4506.6716099578. The cubic root of 20310089 is about 272.8374250633.

The spelling of 20310089 in words is "twenty million, three hundred ten thousand, eighty-nine".