20100544 has 28 divisors (see below), whose sum is σ = 40217344. Its totient is φ = 9967104.

The previous prime is 20100541. The next prime is 20100557. The reversal of 20100544 is 44500102.

20100544 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100541) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6892 + ... + 9364.

Almost surely, 2^20100544 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 20100544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20108672).

20100544 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20100544 is a wasteful number, since it uses less digits than its factorization.

20100544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612 (or 2602 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20100544 is about 4483.3630234457. The cubic root of 20100544 is about 271.8958655585.

Adding to 20100544 its reverse (44500102), we get a palindrome (64600646).

The spelling of 20100544 in words is "twenty million, one hundred thousand, five hundred forty-four".