20469217 has 2 divisors, whose sum is σ = 20469218. Its totient is φ = 20469216.

The previous prime is 20469203. The next prime is 20469227. The reversal of 20469217 is 71296402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20151121 + 318096 = 4489^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 20469217 - 2⁷ = 20469089 is a prime.

It is not a weakly prime, because it can be changed into another prime (20469227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10234608 + 10234609.

It is an arithmetic number, because the mean of its divisors is an integer number (10234609).

Almost surely, 2^20469217 is an apocalyptic number.

It is an amenable number.

20469217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20469217 is an equidigital number, since it uses as much as digits as its factorization.

20469217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20469217 is about 4524.2918782943. The cubic root of 20469217 is about 273.5481256671.

The spelling of 20469217 in words is "twenty million, four hundred sixty-nine thousand, two hundred seventeen".