20041740 has 144 divisors (see below), whose sum is σ = 65415168. Its totient is φ = 4954752.

The previous prime is 20041739. The next prime is 20041757. The reversal of 20041740 is 4714002.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194529 + ... + 194631.

It is an arithmetic number, because the mean of its divisors is an integer number (454272).

Almost surely, 2^20041740 is an apocalyptic number.

20041740 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 20041740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32707584).

20041740 is an abundant number, since it is smaller than the sum of its proper divisors (45373428).

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

20041740 is a wasteful number, since it uses less digits than its factorization.

20041740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20041740 is about 4476.8001965690. The cubic root of 20041740 is about 271.6304634323.

Adding to 20041740 its reverse (4714002), we get a palindrome (24755742).

The spelling of 20041740 in words is "twenty million, forty-one thousand, seven hundred forty".