18481765 has 8 divisors (see below), whose sum is σ = 23142528. Its totient is φ = 14142480.

The previous prime is 18481751. The next prime is 18481769. The reversal of 18481765 is 56718481.

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

It is not a de Polignac number, because 18481765 - 2⁷ = 18481637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18481769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80241 + ... + 80470.

It is an arithmetic number, because the mean of its divisors is an integer number (2892816).

Almost surely, 2^18481765 is an apocalyptic number.

It is an amenable number.

18481765 is a deficient number, since it is larger than the sum of its proper divisors (4660763).

18481765 is a wasteful number, since it uses less digits than its factorization.

18481765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160739.

The product of its digits is 53760, while the sum is 40.

The square root of 18481765 is about 4299.0423352184. The cubic root of 18481765 is about 264.3916983531.

The spelling of 18481765 in words is "eighteen million, four hundred eighty-one thousand, seven hundred sixty-five".