20418012 has 36 divisors (see below), whose sum is σ = 52492440. Its totient is φ = 6689952.

The previous prime is 20418011. The next prime is 20418031. The reversal of 20418012 is 21081402.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20418011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2683 + ... + 6930.

Almost surely, 2^20418012 is an apocalyptic number.

It is an amenable number.

20418012 is an abundant number, since it is smaller than the sum of its proper divisors (32074428).

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

20418012 is a wasteful number, since it uses less digits than its factorization.

20418012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9682 (or 9677 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 20418012 is about 4518.6294382257. The cubic root of 20418012 is about 273.3198360709.

Adding to 20418012 its reverse (21081402), we get a palindrome (41499414).

The spelling of 20418012 in words is "twenty million, four hundred eighteen thousand, twelve".