20321319 has 8 divisors (see below), whose sum is σ = 27144832. Its totient is φ = 13522680.

The previous prime is 20321303. The next prime is 20321339. The reversal of 20321319 is 91312302.

It is a happy number.

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

It is not a de Polignac number, because 20321319 - 2⁴ = 20321303 is a prime.

It is a super-2 number, since 2×20321319² = 825912011799522, 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 = 20321295 and 20321304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4219 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (3393104).

Almost surely, 2^20321319 is an apocalyptic number.

20321319 is a deficient number, since it is larger than the sum of its proper divisors (6823513).

20321319 is a wasteful number, since it uses less digits than its factorization.

20321319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12437.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 20321319 is about 4507.9173683642. The cubic root of 20321319 is about 272.8877022062.

The spelling of 20321319 in words is "twenty million, three hundred twenty-one thousand, three hundred nineteen".