20332231 has 4 divisors (see below), whose sum is σ = 20715912. Its totient is φ = 19948552.

The previous prime is 20332229. The next prime is 20332241. The reversal of 20332231 is 13223302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13223302 = 2 ⋅6611651.

It is a cyclic number.

It is not a de Polignac number, because 20332231 - 2¹ = 20332229 is a prime.

It is a super-2 number, since 2×20332231² = 826799234874722, 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 (20332211) 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, 191761 + ... + 191866.

It is an arithmetic number, because the mean of its divisors is an integer number (5178978).

Almost surely, 2^20332231 is an apocalyptic number.

20332231 is a deficient number, since it is larger than the sum of its proper divisors (383681).

20332231 is an equidigital number, since it uses as much as digits as its factorization.

20332231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383680.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20332231 is about 4509.1275209291. The cubic root of 20332231 is about 272.9365379105.

Adding to 20332231 its reverse (13223302), we get a palindrome (33555533).

The spelling of 20332231 in words is "twenty million, three hundred thirty-two thousand, two hundred thirty-one".