20545344 has 84 divisors (see below), whose sum is σ = 60089796. Its totient is φ = 6709248.

The previous prime is 20545331. The next prime is 20545363. The reversal of 20545344 is 44354502.

20545344 is a `hidden beast` number, since 205 + 453 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10810944 + 9734400 = 3288^2 + 3120^2 .

It is a super-2 number, since 2×20545344² = 844222320156672, which contains 22 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 30192 + ... + 30864.

Almost surely, 2^20545344 is an apocalyptic number.

20545344 is a gapful number since it is divisible by the number (24) 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 20545344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30044898).

20545344 is an abundant number, since it is smaller than the sum of its proper divisors (39544452).

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

20545344 is a wasteful number, since it uses less digits than its factorization.

20545344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 20545344 is about 4532.6972102712. The cubic root of 20545344 is about 273.8868234523.

Adding to 20545344 its reverse (44354502), we get a palindrome (64899846).

The spelling of 20545344 in words is "twenty million, five hundred forty-five thousand, three hundred forty-four".