20550272 has 32 divisors (see below), whose sum is σ = 42268800. Its totient is φ = 9941760.

The previous prime is 20550269. The next prime is 20550287. The reversal of 20550272 is 27205502.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1379 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (1320900).

Almost surely, 2^20550272 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 20550272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21134400).

20550272 is an abundant number, since it is smaller than the sum of its proper divisors (21718528).

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

20550272 is an equidigital number, since it uses as much as digits as its factorization.

20550272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224 (or 5212 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20550272 is about 4533.2407833690. The cubic root of 20550272 is about 273.9087198386.

Adding to 20550272 its reverse (27205502), we get a palindrome (47755774).

The spelling of 20550272 in words is "twenty million, five hundred fifty thousand, two hundred seventy-two".