20326345 has 16 divisors (see below), whose sum is σ = 26429760. Its totient is φ = 14917824.

The previous prime is 20326343. The next prime is 20326349. The reversal of 20326345 is 54362302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20326345 - 2¹ = 20326343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20326343) 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 15 ways as a sum of consecutive naturals, for example, 10762 + ... + 12508.

It is an arithmetic number, because the mean of its divisors is an integer number (1651860).

Almost surely, 2^20326345 is an apocalyptic number.

It is an amenable number.

20326345 is a deficient number, since it is larger than the sum of its proper divisors (6103415).

20326345 is a wasteful number, since it uses less digits than its factorization.

20326345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20326345 is about 4508.4747975341. The cubic root of 20326345 is about 272.9101978020.

Adding to 20326345 its reverse (54362302), we get a palindrome (74688647).

The spelling of 20326345 in words is "twenty million, three hundred twenty-six thousand, three hundred forty-five".