20483231 has 4 divisors (see below), whose sum is σ = 20982864. Its totient is φ = 19983600.

The previous prime is 20483213. The next prime is 20483233. The reversal of 20483231 is 13238402.

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 20483231 - 2¹⁴ = 20466847 is a prime.

It is a super-2 number, since 2×20483231² = 839125504398722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20483197 and 20483206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20483233) 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, 249755 + ... + 249836.

It is an arithmetic number, because the mean of its divisors is an integer number (5245716).

Almost surely, 2^20483231 is an apocalyptic number.

20483231 is a deficient number, since it is larger than the sum of its proper divisors (499633).

20483231 is an equidigital number, since it uses as much as digits as its factorization.

20483231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499632.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20483231 is about 4525.8403639545. The cubic root of 20483231 is about 273.6105385562.

The spelling of 20483231 in words is "twenty million, four hundred eighty-three thousand, two hundred thirty-one".