18906485 has 8 divisors (see below), whose sum is σ = 24433080. Its totient is φ = 13961664.

The previous prime is 18906467. The next prime is 18906509. The reversal of 18906485 is 58460981.

It can be written as a sum of positive squares in 4 ways, for example, as 3232804 + 15673681 = 1798^2 + 3959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18906485 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 145370 + ... + 145499.

It is an arithmetic number, because the mean of its divisors is an integer number (3054135).

Almost surely, 2^18906485 is an apocalyptic number.

It is an amenable number.

18906485 is a deficient number, since it is larger than the sum of its proper divisors (5526595).

18906485 is a wasteful number, since it uses less digits than its factorization.

18906485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290887.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 18906485 is about 4348.1588057476. The cubic root of 18906485 is about 266.4016629514.

It can be divided in two parts, 18906 and 485, that added together give a palindrome (19391).

The spelling of 18906485 in words is "eighteen million, nine hundred six thousand, four hundred eighty-five".