20566135 has 8 divisors (see below), whose sum is σ = 24716736. Its totient is φ = 16428000.

The previous prime is 20566129. The next prime is 20566159. The reversal of 20566135 is 53166502.

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

It is not a de Polignac number, because 20566135 - 2¹¹ = 20564087 is a prime.

It is a Duffinian number.

It is a congruent 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, 1017 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (3089592).

Almost surely, 2^20566135 is an apocalyptic number.

20566135 is a deficient number, since it is larger than the sum of its proper divisors (4150601).

20566135 is an equidigital number, since it uses as much as digits as its factorization.

20566135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6233.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20566135 is about 4534.9900771667. The cubic root of 20566135 is about 273.9791795144.

The spelling of 20566135 in words is "twenty million, five hundred sixty-six thousand, one hundred thirty-five".