18535945 has 4 divisors (see below), whose sum is σ = 22243140. Its totient is φ = 14828752.

The previous prime is 18535943. The next prime is 18535961. The reversal of 18535945 is 54953581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10310521 + 8225424 = 3211^2 + 2868^2 .

It is a cyclic number.

It is not a de Polignac number, because 18535945 - 2¹ = 18535943 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18535898 and 18535907.

It is not an unprimeable number, because it can be changed into a prime (18535943) 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 3 ways as a sum of consecutive naturals, for example, 1853590 + ... + 1853599.

It is an arithmetic number, because the mean of its divisors is an integer number (5560785).

Almost surely, 2^18535945 is an apocalyptic number.

It is an amenable number.

18535945 is a deficient number, since it is larger than the sum of its proper divisors (3707195).

18535945 is an equidigital number, since it uses as much as digits as its factorization.

18535945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707194.

The product of its digits is 108000, while the sum is 40.

The square root of 18535945 is about 4305.3391271769. The cubic root of 18535945 is about 264.6498044219.

The spelling of 18535945 in words is "eighteen million, five hundred thirty-five thousand, nine hundred forty-five".