20552616 has 160 divisors (see below), whose sum is σ = 68999040. Its totient is φ = 5588352.

The previous prime is 20552611. The next prime is 20552627. The reversal of 20552616 is 61625502.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20552616.

It is not an unprimeable number, because it can be changed into a prime (20552611) 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 39 ways as a sum of consecutive naturals, for example, 104230 + ... + 104426.

It is an arithmetic number, because the mean of its divisors is an integer number (431244).

Almost surely, 2^20552616 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 20552616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34499520).

20552616 is an abundant number, since it is smaller than the sum of its proper divisors (48446424).

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

20552616 is a wasteful number, since it uses less digits than its factorization.

20552616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 232 counting only the distinct ones).

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

The square root of 20552616 is about 4533.4993106871. The cubic root of 20552616 is about 273.9191336120.

The spelling of 20552616 in words is "twenty million, five hundred fifty-two thousand, six hundred sixteen".