20608573 has 16 divisors (see below), whose sum is σ = 22569840. Its totient is φ = 18743296.

The previous prime is 20608543. The next prime is 20608613. The reversal of 20608573 is 37580602.

It can be written as a sum of positive squares in 8 ways, for example, as 3526884 + 17081689 = 1878^2 + 4133^2 .

It is a cyclic number.

It is not a de Polignac number, because 20608573 - 2⁵ = 20608541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20608543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80061 + ... + 80317.

It is an arithmetic number, because the mean of its divisors is an integer number (1410615).

Almost surely, 2^20608573 is an apocalyptic number.

It is an amenable number.

20608573 is a deficient number, since it is larger than the sum of its proper divisors (1961267).

20608573 is a wasteful number, since it uses less digits than its factorization.

20608573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20608573 is about 4539.6666177154. Note that the first 4 decimals coincide. The cubic root of 20608573 is about 274.1675010779.

The spelling of 20608573 in words is "twenty million, six hundred eight thousand, five hundred seventy-three".