20413321 has 8 divisors (see below), whose sum is σ = 20865600. Its totient is φ = 19963632.

The previous prime is 20413291. The next prime is 20413331. The reversal of 20413321 is 12331402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20413321 - 2¹³ = 20405129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20413295 and 20413304.

It is not an unprimeable number, because it can be changed into a prime (20413331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31426 + ... + 32068.

It is an arithmetic number, because the mean of its divisors is an integer number (2608200).

Almost surely, 2^20413321 is an apocalyptic number.

It is an amenable number.

20413321 is a deficient number, since it is larger than the sum of its proper divisors (452279).

20413321 is an equidigital number, since it uses as much as digits as its factorization.

20413321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20413321 is about 4518.1103350848. The cubic root of 20413321 is about 273.2989028943.

Adding to 20413321 its reverse (12331402), we get a palindrome (32744723).

The spelling of 20413321 in words is "twenty million, four hundred thirteen thousand, three hundred twenty-one".