20248769 has 4 divisors (see below), whose sum is σ = 20258244. Its totient is φ = 20239296.

The previous prime is 20248733. The next prime is 20248771. The reversal of 20248769 is 96784202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96784202 = 2 ⋅48392101.

It can be written as a sum of positive squares in 2 ways, for example, as 16200625 + 4048144 = 4025^2 + 2012^2 .

It is a cyclic number.

It is not a de Polignac number, because 20248769 - 2¹² = 20244673 is a prime.

It is a super-2 number, since 2×20248769² = 820025292030722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20248729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149 + ... + 6365.

It is an arithmetic number, because the mean of its divisors is an integer number (5064561).

Almost surely, 2^20248769 is an apocalyptic number.

It is an amenable number.

20248769 is a deficient number, since it is larger than the sum of its proper divisors (9475).

20248769 is an equidigital number, since it uses as much as digits as its factorization.

20248769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 20248769 is about 4499.8632201435. The cubic root of 20248769 is about 272.5625656636.

The spelling of 20248769 in words is "twenty million, two hundred forty-eight thousand, seven hundred sixty-nine".