18368941 has 4 divisors (see below), whose sum is σ = 18531612. Its totient is φ = 18206272.

The previous prime is 18368939. The next prime is 18368947. The reversal of 18368941 is 14986381.

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 5616900 + 12752041 = 2370^2 + 3571^2 .

It is a cyclic number.

It is not a de Polignac number, because 18368941 - 2¹ = 18368939 is a prime.

It is a super-2 number, since 2×18368941² = 674835986922962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18368894 and 18368903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18368947) 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, 81166 + ... + 81391.

It is an arithmetic number, because the mean of its divisors is an integer number (4632903).

Almost surely, 2^18368941 is an apocalyptic number.

It is an amenable number.

18368941 is a deficient number, since it is larger than the sum of its proper divisors (162671).

18368941 is a wasteful number, since it uses less digits than its factorization.

18368941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162670.

The product of its digits is 41472, while the sum is 40.

The square root of 18368941 is about 4285.9002554889. The cubic root of 18368941 is about 263.8525969683.

The spelling of 18368941 in words is "eighteen million, three hundred sixty-eight thousand, nine hundred forty-one".