20454544 has 80 divisors (see below), whose sum is σ = 46854144. Its totient is φ = 8553600.

The previous prime is 20454529. The next prime is 20454547. The reversal of 20454544 is 44545402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125407 + ... + 125569.

Almost surely, 2^20454544 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 20454544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23427072).

20454544 is an abundant number, since it is smaller than the sum of its proper divisors (26399600).

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

20454544 is a wasteful number, since it uses less digits than its factorization.

20454544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 20454544 is about 4522.6700078604. The cubic root of 20454544 is about 273.4827473139.

Adding to 20454544 its reverse (44545402), we get a palindrome (64999946).

The spelling of 20454544 in words is "twenty million, four hundred fifty-four thousand, five hundred forty-four".