20969269 has 4 divisors (see below), whose sum is σ = 21536044. Its totient is φ = 20402496.

The previous prime is 20969239. The next prime is 20969281. The reversal of 20969269 is 96296902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9847044 + 11122225 = 3138^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 20969269 - 2¹⁷ = 20838197 is a prime.

It is a super-2 number, since 2×20969269² = 879420484788722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20969209) 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, 283332 + ... + 283405.

It is an arithmetic number, because the mean of its divisors is an integer number (5384011).

Almost surely, 2^20969269 is an apocalyptic number.

It is an amenable number.

20969269 is a deficient number, since it is larger than the sum of its proper divisors (566775).

20969269 is an equidigital number, since it uses as much as digits as its factorization.

20969269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566774.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 20969269 is about 4579.2214403761. The cubic root of 20969269 is about 275.7577733685.

The spelling of 20969269 in words is "twenty million, nine hundred sixty-nine thousand, two hundred sixty-nine".