20618012 has 12 divisors (see below), whose sum is σ = 36163680. Its totient is φ = 10285536.

The previous prime is 20618011. The next prime is 20618023. The reversal of 20618012 is 21081602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20618011) by changing a digit.

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, 3812 + ... + 7467.

It is an arithmetic number, because the mean of its divisors is an integer number (3013640).

Almost surely, 2^20618012 is an apocalyptic number.

It is an amenable number.

20618012 is a deficient number, since it is larger than the sum of its proper divisors (15545668).

20618012 is a wasteful number, since it uses less digits than its factorization.

20618012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11740 (or 11738 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 20618012 is about 4540.7061124896. The cubic root of 20618012 is about 274.2093521407.

Adding to 20618012 its reverse (21081602), we get a palindrome (41699614).

The spelling of 20618012 in words is "twenty million, six hundred eighteen thousand, twelve".