20323911 has 4 divisors (see below), whose sum is σ = 27098552. Its totient is φ = 13549272.

The previous prime is 20323909. The next prime is 20323913. The reversal of 20323911 is 11932302.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20323909) and next prime (20323913).

It is not a de Polignac number, because 20323911 - 2¹ = 20323909 is a prime.

It is a super-2 number, since 2×20323911² = 826122716671842, 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 (20323913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387316 + ... + 3387321.

It is an arithmetic number, because the mean of its divisors is an integer number (6774638).

Almost surely, 2^20323911 is an apocalyptic number.

20323911 is a deficient number, since it is larger than the sum of its proper divisors (6774641).

20323911 is an equidigital number, since it uses as much as digits as its factorization.

20323911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6774640.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 20323911 is about 4508.2048533757. The cubic root of 20323911 is about 272.8993040590.

The spelling of 20323911 in words is "twenty million, three hundred twenty-three thousand, nine hundred eleven".