20126240 has 24 divisors (see below), whose sum is σ = 47548620. Its totient is φ = 8050432.

The previous prime is 20126237. The next prime is 20126251. The reversal of 20126240 is 4262102.

It can be written as a sum of positive squares in 2 ways, for example, as 19963024 + 163216 = 4468^2 + 404^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62735 + ... + 63054.

Almost surely, 2^20126240 is an apocalyptic number.

20126240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20126240 is an abundant number, since it is smaller than the sum of its proper divisors (27422380).

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

20126240 is a wasteful number, since it uses less digits than its factorization.

20126240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125804 (or 125796 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20126240 is about 4486.2278140995. The cubic root of 20126240 is about 272.0116776993.

Adding to 20126240 its reverse (4262102), we get a palindrome (24388342).

The spelling of 20126240 in words is "twenty million, one hundred twenty-six thousand, two hundred forty".