20564345 has 8 divisors (see below), whose sum is σ = 24732864. Its totient is φ = 16414384.

The previous prime is 20564321. The next prime is 20564359. The reversal of 20564345 is 54346502.

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 20564345 - 2⁶ = 20564281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2069 + ... + 6738.

It is an arithmetic number, because the mean of its divisors is an integer number (3091608).

Almost surely, 2^20564345 is an apocalyptic number.

It is an amenable number.

20564345 is a deficient number, since it is larger than the sum of its proper divisors (4168519).

20564345 is an equidigital number, since it uses as much as digits as its factorization.

20564345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9279.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 20564345 is about 4534.7927185264. The cubic root of 20564345 is about 273.9712305738.

The spelling of 20564345 in words is "twenty million, five hundred sixty-four thousand, three hundred forty-five".