20296321 has 4 divisors (see below), whose sum is σ = 20305492. Its totient is φ = 20287152.

The previous prime is 20296291. The next prime is 20296337. The reversal of 20296321 is 12369202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12369202 = 2 ⋅6184601.

It can be written as a sum of positive squares in 2 ways, for example, as 11296321 + 9000000 = 3361^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 20296321 - 2⁷ = 20296193 is a prime.

It is a super-2 number, since 2×20296321² = 823881292270082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20296021) 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 3 ways as a sum of consecutive naturals, for example, 1015 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (5076373).

Almost surely, 2^20296321 is an apocalyptic number.

It is an amenable number.

20296321 is a deficient number, since it is larger than the sum of its proper divisors (9171).

20296321 is an equidigital number, since it uses as much as digits as its factorization.

20296321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9170.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20296321 is about 4505.1438378813. The cubic root of 20296321 is about 272.7757599010.

Subtracting from 20296321 its product of nonzero digits (1296), we obtain a square (20295025 = 4505²).

The spelling of 20296321 in words is "twenty million, two hundred ninety-six thousand, three hundred twenty-one".