20411140 has 12 divisors (see below), whose sum is σ = 42863436. Its totient is φ = 8164448.

The previous prime is 20411129. The next prime is 20411141. The reversal of 20411140 is 4111402.

It can be written as a sum of positive squares in 2 ways, for example, as 12559936 + 7851204 = 3544^2 + 2802^2 .

It is a super-2 number, since 2×20411140² = 833229272199200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20411140.

It is not an unprimeable number, because it can be changed into a prime (20411141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510259 + ... + 510298.

It is an arithmetic number, because the mean of its divisors is an integer number (3571953).

Almost surely, 2^20411140 is an apocalyptic number.

20411140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20411140 is an abundant number, since it is smaller than the sum of its proper divisors (22452296).

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

20411140 is a wasteful number, since it uses less digits than its factorization.

20411140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020566 (or 1020564 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20411140 is about 4517.8689666700. The cubic root of 20411140 is about 273.2891692807.

Adding to 20411140 its reverse (4111402), we get a palindrome (24522542).

The spelling of 20411140 in words is "twenty million, four hundred eleven thousand, one hundred forty".