20112040 has 32 divisors (see below), whose sum is σ = 48734280. Its totient is φ = 7425792.

The previous prime is 20112031. The next prime is 20112061. The reversal of 20112040 is 4021102.

It can be written as a sum of positive squares in 4 ways, for example, as 6584356 + 13527684 = 2566^2 + 3678^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18819 + ... + 19858.

Almost surely, 2^20112040 is an apocalyptic number.

20112040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112040 is an abundant number, since it is smaller than the sum of its proper divisors (28622240).

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

20112040 is a wasteful number, since it uses less digits than its factorization.

20112040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38701 (or 38697 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20112040 is about 4484.6449134798. The cubic root of 20112040 is about 271.9476903444.

Adding to 20112040 its reverse (4021102), we get a palindrome (24133142).

The spelling of 20112040 in words is "twenty million, one hundred twelve thousand, forty".