20347169 has 2 divisors, whose sum is σ = 20347170. Its totient is φ = 20347168.

The previous prime is 20347121. The next prime is 20347207. The reversal of 20347169 is 96174302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18809569 + 1537600 = 4337^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 20347169 - 2²⁴ = 3569953 is a prime.

It is a super-2 number, since 2×20347169² = 828014572629122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20347069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173584 + 10173585.

It is an arithmetic number, because the mean of its divisors is an integer number (10173585).

Almost surely, 2^20347169 is an apocalyptic number.

It is an amenable number.

20347169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20347169 is an equidigital number, since it uses as much as digits as its factorization.

20347169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20347169 is about 4510.7836348023. The cubic root of 20347169 is about 273.0033633026.

The spelling of 20347169 in words is "twenty million, three hundred forty-seven thousand, one hundred sixty-nine".