20609552 has 40 divisors (see below), whose sum is σ = 41481720. Its totient is φ = 9912320.

The previous prime is 20609543. The next prime is 20609569. The reversal of 20609552 is 25590602.

It can be written as a sum of positive squares in 4 ways, for example, as 215296 + 20394256 = 464^2 + 4516^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58208 + ... + 58560.

It is an arithmetic number, because the mean of its divisors is an integer number (1037043).

Almost surely, 2^20609552 is an apocalyptic number.

It is an amenable number.

20609552 is an abundant number, since it is smaller than the sum of its proper divisors (20872168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20609552 is a wasteful number, since it uses less digits than its factorization.

20609552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 20609552 is about 4539.7744437362. The cubic root of 20609552 is about 274.1718424060.

The spelling of 20609552 in words is "twenty million, six hundred nine thousand, five hundred fifty-two".