20448469 has 2 divisors, whose sum is σ = 20448470. Its totient is φ = 20448468.

The previous prime is 20448443. The next prime is 20448511. The reversal of 20448469 is 96484402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20160100 + 288369 = 4490^2 + 537^2 .

It is a cyclic number.

It is not a de Polignac number, because 20448469 - 2⁷ = 20448341 is a prime.

It is a super-2 number, since 2×20448469² = 836279768887922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20448409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224234 + 10224235.

It is an arithmetic number, because the mean of its divisors is an integer number (10224235).

Almost surely, 2^20448469 is an apocalyptic number.

It is an amenable number.

20448469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20448469 is an equidigital number, since it uses as much as digits as its factorization.

20448469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 20448469 is about 4521.9983414415. The cubic root of 20448469 is about 273.4556698391.

The spelling of 20448469 in words is "twenty million, four hundred forty-eight thousand, four hundred sixty-nine".