20325331 has 4 divisors (see below), whose sum is σ = 21888832. Its totient is φ = 18761832.

The previous prime is 20325311. The next prime is 20325337. The reversal of 20325331 is 13352302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20325331 - 2⁷ = 20325203 is a prime.

It is a super-2 number, since 2×20325331² = 826238160519122, 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 = 20325299 and 20325308.

It is not an unprimeable number, because it can be changed into a prime (20325337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781731 + ... + 781756.

It is an arithmetic number, because the mean of its divisors is an integer number (5472208).

Almost surely, 2^20325331 is an apocalyptic number.

20325331 is a deficient number, since it is larger than the sum of its proper divisors (1563501).

20325331 is a wasteful number, since it uses less digits than its factorization.

20325331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563500.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 20325331 is about 4508.3623412499. The cubic root of 20325331 is about 272.9056595940.

Adding to 20325331 its reverse (13352302), we get a palindrome (33677633).

The spelling of 20325331 in words is "twenty million, three hundred twenty-five thousand, three hundred thirty-one".