20112340 has 12 divisors (see below), whose sum is σ = 42235956. Its totient is φ = 8044928.

The previous prime is 20112331. The next prime is 20112361. The reversal of 20112340 is 4321102.

It can be written as a sum of positive squares in 2 ways, for example, as 6906384 + 13205956 = 2628^2 + 3634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20112340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502789 + ... + 502828.

It is an arithmetic number, because the mean of its divisors is an integer number (3519663).

Almost surely, 2^20112340 is an apocalyptic number.

20112340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112340 is an abundant number, since it is smaller than the sum of its proper divisors (22123616).

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

20112340 is a wasteful number, since it uses less digits than its factorization.

20112340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005626 (or 1005624 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20112340 is about 4484.6783608192. The cubic root of 20112340 is about 271.9490425013.

Adding to 20112340 its reverse (4321102), we get a palindrome (24433442).

The spelling of 20112340 in words is "twenty million, one hundred twelve thousand, three hundred forty".