20269269 has 12 divisors (see below), whose sum is σ = 29318796. Its totient is φ = 13493952.

The previous prime is 20269259. The next prime is 20269283. The reversal of 20269269 is 96296202.

It can be written as a sum of positive squares in 2 ways, for example, as 8054244 + 12215025 = 2838^2 + 3495^2 .

It is not a de Polignac number, because 20269269 - 2⁹ = 20268757 is a prime.

It is a super-2 number, since 2×20269269² = 821686531588722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20269259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8847 + ... + 10899.

It is an arithmetic number, because the mean of its divisors is an integer number (2443233).

Almost surely, 2^20269269 is an apocalyptic number.

It is an amenable number.

20269269 is a deficient number, since it is larger than the sum of its proper divisors (9049527).

20269269 is a wasteful number, since it uses less digits than its factorization.

20269269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156 (or 3153 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 20269269 is about 4502.1404909221. The cubic root of 20269269 is about 272.6545160770.

The spelling of 20269269 in words is "twenty million, two hundred sixty-nine thousand, two hundred sixty-nine".