20312269 has 4 divisors (see below), whose sum is σ = 20323996. Its totient is φ = 20300544.

The previous prime is 20312249. The next prime is 20312293. The reversal of 20312269 is 96221302.

It is a happy number.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 9847044 + 10465225 = 3138^2 + 3235^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312269 - 2¹³ = 20304077 is a prime.

It is a super-2 number, since 2×20312269² = 825176543856722, 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 (20312219) 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, 2694 + ... + 6919.

It is an arithmetic number, because the mean of its divisors is an integer number (5080999).

Almost surely, 2^20312269 is an apocalyptic number.

It is an amenable number.

20312269 is a deficient number, since it is larger than the sum of its proper divisors (11727).

20312269 is an equidigital number, since it uses as much as digits as its factorization.

20312269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11726.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20312269 is about 4506.9134671081. The cubic root of 20312269 is about 272.8471864567.

The spelling of 20312269 in words is "twenty million, three hundred twelve thousand, two hundred sixty-nine".