20326541 has 4 divisors (see below), whose sum is σ = 20349084. Its totient is φ = 20304000.

The previous prime is 20326531. The next prime is 20326571. The reversal of 20326541 is 14562302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15721225 + 4605316 = 3965^2 + 2146^2 .

It is a cyclic number.

It is not a de Polignac number, because 20326541 - 2¹⁰ = 20325517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20326511) 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, 9860 + ... + 11741.

It is an arithmetic number, because the mean of its divisors is an integer number (5087271).

Almost surely, 2^20326541 is an apocalyptic number.

It is an amenable number.

20326541 is a deficient number, since it is larger than the sum of its proper divisors (22543).

20326541 is an equidigital number, since it uses as much as digits as its factorization.

20326541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22542.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20326541 is about 4508.4965343227. The cubic root of 20326541 is about 272.9110749924.

Adding to 20326541 its reverse (14562302), we get a palindrome (34888843).

The spelling of 20326541 in words is "twenty million, three hundred twenty-six thousand, five hundred forty-one".