20550552 has 128 divisors (see below), whose sum is σ = 62726400. Its totient is φ = 5529600.

The previous prime is 20550547. The next prime is 20550587. The reversal of 20550552 is 25505502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85152 + ... + 85392.

It is an arithmetic number, because the mean of its divisors is an integer number (490050).

Almost surely, 2^20550552 is an apocalyptic number.

20550552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20550552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31363200).

20550552 is an abundant number, since it is smaller than the sum of its proper divisors (42175848).

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

20550552 is a wasteful number, since it uses less digits than its factorization.

20550552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 20550552 is about 4533.2716662472. The cubic root of 20550552 is about 273.9099638463.

The spelling of 20550552 in words is "twenty million, five hundred fifty thousand, five hundred fifty-two".