20544000 has 160 divisors (see below), whose sum is σ = 68942016. Its totient is φ = 5427200.

The previous prime is 20543969. The next prime is 20544001. The reversal of 20544000 is 44502.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20544001) 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, 191947 + ... + 192053.

Almost surely, 2^20544000 is an apocalyptic number.

20544000 is a gapful number since it is divisible by the number (20) 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 20544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34471008).

20544000 is an abundant number, since it is smaller than the sum of its proper divisors (48398016).

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

20544000 is an equidigital number, since it uses as much as digits as its factorization.

20544000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20544000 is about 4532.5489517489. The cubic root of 20544000 is about 273.8808511029.

Adding to 20544000 its reverse (44502), we get a palindrome (20588502).

The spelling of 20544000 in words is "twenty million, five hundred forty-four thousand".