20559232 has 16 divisors (see below), whose sum is σ = 40958100. Its totient is φ = 10279552.

The previous prime is 20559223. The next prime is 20559233. The reversal of 20559232 is 23295502.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 20559232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20559233) by changing a digit.

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 as a sum of consecutive naturals, namely, 80182 + ... + 80437.

Almost surely, 2^20559232 is an apocalyptic number.

It is an amenable number.

20559232 is a deficient number, since it is larger than the sum of its proper divisors (20398868).

20559232 is an equidigital number, since it uses as much as digits as its factorization.

20559232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160633 (or 160621 counting only the distinct ones).

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

The square root of 20559232 is about 4534.2289311414. The cubic root of 20559232 is about 273.9485224834.

The spelling of 20559232 in words is "twenty million, five hundred fifty-nine thousand, two hundred thirty-two".