20441040 has 80 divisors (see below), whose sum is σ = 64603008. Its totient is φ = 5344768.

The previous prime is 20441033. The next prime is 20441051. The reversal of 20441040 is 4014402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20441040² = 835672232563200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11917 + ... + 13523.

Almost surely, 2^20441040 is an apocalyptic number.

20441040 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 20441040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32301504).

20441040 is an abundant number, since it is smaller than the sum of its proper divisors (44161968).

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

20441040 is a wasteful number, since it uses less digits than its factorization.

20441040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 20441040 is about 4521.1768379483. The cubic root of 20441040 is about 273.4225500289.

Adding to 20441040 its reverse (4014402), we get a palindrome (24455442).

The spelling of 20441040 in words is "twenty million, four hundred forty-one thousand, forty".