20573345 has 16 divisors (see below), whose sum is σ = 26831952. Its totient is φ = 15052800.

The previous prime is 20573341. The next prime is 20573347. The reversal of 20573345 is 54337502.

It can be written as a sum of positive squares in 8 ways, for example, as 6315169 + 14258176 = 2513^2 + 3776^2 .

It is not a de Polignac number, because 20573345 - 2² = 20573341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20573341) 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 15 ways as a sum of consecutive naturals, for example, 5945 + ... + 8745.

It is an arithmetic number, because the mean of its divisors is an integer number (1676997).

Almost surely, 2^20573345 is an apocalyptic number.

It is an amenable number.

20573345 is a deficient number, since it is larger than the sum of its proper divisors (6258607).

20573345 is a wasteful number, since it uses less digits than its factorization.

20573345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2932.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 20573345 is about 4535.7849375825. The cubic root of 20573345 is about 274.0111926449.

The spelling of 20573345 in words is "twenty million, five hundred seventy-three thousand, three hundred forty-five".