20334561 has 8 divisors (see below), whose sum is σ = 29198400. Its totient is φ = 12513552.

The previous prime is 20334557. The next prime is 20334577. The reversal of 20334561 is 16543302.

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 20334561 - 2² = 20334557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20334511) 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 7 ways as a sum of consecutive naturals, for example, 260661 + ... + 260738.

It is an arithmetic number, because the mean of its divisors is an integer number (3649800).

Almost surely, 2^20334561 is an apocalyptic number.

It is an amenable number.

20334561 is a deficient number, since it is larger than the sum of its proper divisors (8863839).

20334561 is a wasteful number, since it uses less digits than its factorization.

20334561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521415.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20334561 is about 4509.3858783653. The cubic root of 20334561 is about 272.9469633583.

Adding to 20334561 its reverse (16543302), we get a palindrome (36877863).

The spelling of 20334561 in words is "twenty million, three hundred thirty-four thousand, five hundred sixty-one".