20553344 has 96 divisors (see below), whose sum is σ = 49709700. Its totient is φ = 8429568.

The previous prime is 20553331. The next prime is 20553353. The reversal of 20553344 is 44335502.

It can be written as a sum of positive squares in 2 ways, for example, as 18593344 + 1960000 = 4312^2 + 1400^2 .

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 181832 + ... + 181944.

Almost surely, 2^20553344 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 20553344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24854850).

20553344 is an abundant number, since it is smaller than the sum of its proper divisors (29156356).

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

20553344 is a wasteful number, since it uses less digits than its factorization.

20553344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 20553344 is about 4533.5796011540. The cubic root of 20553344 is about 273.9223677627.

Adding to 20553344 its reverse (44335502), we get a palindrome (64888846).

The spelling of 20553344 in words is "twenty million, five hundred fifty-three thousand, three hundred forty-four".