20312339 has 4 divisors (see below), whose sum is σ = 20371224. Its totient is φ = 20253456.

The previous prime is 20312309. The next prime is 20312351. The reversal of 20312339 is 93321302.

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

It is a cyclic number.

It is not a de Polignac number, because 20312339 - 2¹⁶ = 20246803 is a prime.

It is a super-2 number, since 2×20312339² = 825182231301842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312309) 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, 28922 + ... + 29615.

It is an arithmetic number, because the mean of its divisors is an integer number (5092806).

Almost surely, 2^20312339 is an apocalyptic number.

20312339 is a deficient number, since it is larger than the sum of its proper divisors (58885).

20312339 is an equidigital number, since it uses as much as digits as its factorization.

20312339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58884.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 20312339 is about 4506.9212329483. The cubic root of 20312339 is about 272.8474998844.

The spelling of 20312339 in words is "twenty million, three hundred twelve thousand, three hundred thirty-nine".