20559204 has 48 divisors (see below), whose sum is σ = 54613440. Its totient is φ = 6684480.

The previous prime is 20559193. The next prime is 20559223. The reversal of 20559204 is 40295502.

It is a super-2 number, since 2×20559204² = 845361738227232, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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, 2107 + ... + 6749.

It is an arithmetic number, because the mean of its divisors is an integer number (1137780).

Almost surely, 2^20559204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20559204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27306720).

20559204 is an abundant number, since it is smaller than the sum of its proper divisors (34054236).

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

20559204 is a wasteful number, since it uses less digits than its factorization.

20559204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4697 (or 4689 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20559204 is about 4534.2258435151. The cubic root of 20559204 is about 273.9483981181.

The spelling of 20559204 in words is "twenty million, five hundred fifty-nine thousand, two hundred four".