20383321 has 4 divisors (see below), whose sum is σ = 23295232. Its totient is φ = 17471412.

The previous prime is 20383303. The next prime is 20383351. The reversal of 20383321 is 12338302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-20383321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20383292 and 20383301.

It is not an unprimeable number, because it can be changed into a prime (20383351) 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, 1455945 + ... + 1455958.

It is an arithmetic number, because the mean of its divisors is an integer number (5823808).

Almost surely, 2^20383321 is an apocalyptic number.

It is an amenable number.

20383321 is a deficient number, since it is larger than the sum of its proper divisors (2911911).

20383321 is an equidigital number, since it uses as much as digits as its factorization.

20383321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911910.

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

The square root of 20383321 is about 4514.7891423631. The cubic root of 20383321 is about 273.1649546284.

The spelling of 20383321 in words is "twenty million, three hundred eighty-three thousand, three hundred twenty-one".