18319941 has 6 divisors (see below), whose sum is σ = 26462150. Its totient is φ = 12213288.

The previous prime is 18319919. The next prime is 18319963. The reversal of 18319941 is 14991381.

It is an interprime number because it is at equal distance from previous prime (18319919) and next prime (18319963).

It can be written as a sum of positive squares in only one way, i.e., 9641025 + 8678916 = 3105^2 + 2946^2 .

It is not a de Polignac number, because 18319941 - 2⁹ = 18319429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18319896 and 18319905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18319901) 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 5 ways as a sum of consecutive naturals, for example, 1017766 + ... + 1017783.

Almost surely, 2^18319941 is an apocalyptic number.

It is an amenable number.

18319941 is a deficient number, since it is larger than the sum of its proper divisors (8142209).

18319941 is a wasteful number, since it uses less digits than its factorization.

18319941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035555 (or 2035552 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 18319941 is about 4280.1800195786. The cubic root of 18319941 is about 263.6177750415.

The spelling of 18319941 in words is "eighteen million, three hundred nineteen thousand, nine hundred forty-one".