18906044 has 24 divisors (see below), whose sum is σ = 33723648. Its totient is φ = 9272880.

The previous prime is 18906031. The next prime is 18906049. The reversal of 18906044 is 44060981.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18906044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18906049) 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 7 ways as a sum of consecutive naturals, for example, 69629 + ... + 69899.

It is an arithmetic number, because the mean of its divisors is an integer number (1405152).

Almost surely, 2^18906044 is an apocalyptic number.

It is an amenable number.

18906044 is a deficient number, since it is larger than the sum of its proper divisors (14817604).

18906044 is a wasteful number, since it uses less digits than its factorization.

18906044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18906044 is about 4348.1080943325. The cubic root of 18906044 is about 266.3995916330.

The spelling of 18906044 in words is "eighteen million, nine hundred six thousand, forty-four".