20012544 has 120 divisors (see below), whose sum is σ = 59685912. Its totient is φ = 6451200.

The previous prime is 20012543. The next prime is 20012561. The reversal of 20012544 is 44521002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198094 + ... + 198194.

Almost surely, 2^20012544 is an apocalyptic number.

20012544 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 20012544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29842956).

20012544 is an abundant number, since it is smaller than the sum of its proper divisors (39673368).

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

20012544 is a wasteful number, since it uses less digits than its factorization.

20012544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20012544 is about 4473.5381969980. The cubic root of 20012544 is about 271.4984992235.

Adding to 20012544 its reverse (44521002), we get a palindrome (64533546).

The spelling of 20012544 in words is "twenty million, twelve thousand, five hundred forty-four".