20238313 has 4 divisors (see below), whose sum is σ = 21428820. Its totient is φ = 19047808.

The previous prime is 20238307. The next prime is 20238329. The reversal of 20238313 is 31383202.

It is a happy number.

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 9162729 + 11075584 = 3027^2 + 3328^2 .

It is a cyclic number.

It is not a de Polignac number, because 20238313 - 2⁹ = 20237801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20238353) 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, 595228 + ... + 595261.

It is an arithmetic number, because the mean of its divisors is an integer number (5357205).

Almost surely, 2^20238313 is an apocalyptic number.

It is an amenable number.

20238313 is a deficient number, since it is larger than the sum of its proper divisors (1190507).

20238313 is a wasteful number, since it uses less digits than its factorization.

20238313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190506.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20238313 is about 4498.7012570296. The cubic root of 20238313 is about 272.5156425664.

The spelling of 20238313 in words is "twenty million, two hundred thirty-eight thousand, three hundred thirteen".