18495641 has 4 divisors (see below), whose sum is σ = 18512484. Its totient is φ = 18478800.

The previous prime is 18495629. The next prime is 18495647. The reversal of 18495641 is 14659481.

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 17808400 + 687241 = 4220^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 18495641 - 2⁶ = 18495577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18495595 and 18495604.

It is not an unprimeable number, because it can be changed into a prime (18495647) 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, 6650 + ... + 9011.

It is an arithmetic number, because the mean of its divisors is an integer number (4628121).

Almost surely, 2^18495641 is an apocalyptic number.

It is an amenable number.

18495641 is a deficient number, since it is larger than the sum of its proper divisors (16843).

18495641 is a wasteful number, since it uses less digits than its factorization.

18495641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16842.

The product of its digits is 34560, while the sum is 38.

The square root of 18495641 is about 4300.6558802118. The cubic root of 18495641 is about 264.4578497090.

The spelling of 18495641 in words is "eighteen million, four hundred ninety-five thousand, six hundred forty-one".