20564323 has 8 divisors (see below), whose sum is σ = 23109408. Its totient is φ = 18156864.

The previous prime is 20564321. The next prime is 20564359. The reversal of 20564323 is 32346502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20564323 - 2¹ = 20564321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20564321) 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, 34090 + ... + 34687.

It is an arithmetic number, because the mean of its divisors is an integer number (2888676).

Almost surely, 2^20564323 is an apocalyptic number.

20564323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20564323 is a deficient number, since it is larger than the sum of its proper divisors (2545085).

20564323 is a wasteful number, since it uses less digits than its factorization.

20564323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68813.

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

The square root of 20564323 is about 4534.7902928360. The cubic root of 20564323 is about 273.9711328744.

The spelling of 20564323 in words is "twenty million, five hundred sixty-four thousand, three hundred twenty-three".