18435745 has 8 divisors (see below), whose sum is σ = 22251816. Its totient is φ = 14662656.

The previous prime is 18435733. The next prime is 18435749. The reversal of 18435745 is 54753481.

It can be written as a sum of positive squares in 4 ways, for example, as 3326976 + 15108769 = 1824^2 + 3887^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18435745 - 2⁵ = 18435713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18435749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9792 + ... + 11521.

It is an arithmetic number, because the mean of its divisors is an integer number (2781477).

Almost surely, 2^18435745 is an apocalyptic number.

It is an amenable number.

18435745 is a deficient number, since it is larger than the sum of its proper divisors (3816071).

18435745 is a wasteful number, since it uses less digits than its factorization.

18435745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21491.

The product of its digits is 67200, while the sum is 37.

The square root of 18435745 is about 4293.6866443652. The cubic root of 18435745 is about 264.1720689164.

The spelling of 18435745 in words is "eighteen million, four hundred thirty-five thousand, seven hundred forty-five".