18965941 has 4 divisors (see below), whose sum is σ = 19478572. Its totient is φ = 18453312.

The previous prime is 18965929. The next prime is 18965953. The reversal of 18965941 is 14956981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14956981 = 13 ⋅1150537.

It is an interprime number because it is at equal distance from previous prime (18965929) and next prime (18965953).

It can be written as a sum of positive squares in 2 ways, for example, as 14326225 + 4639716 = 3785^2 + 2154^2 .

It is a cyclic number.

It is not a de Polignac number, because 18965941 - 2⁵ = 18965909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18965981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256260 + ... + 256333.

It is an arithmetic number, because the mean of its divisors is an integer number (4869643).

Almost surely, 2^18965941 is an apocalyptic number.

It is an amenable number.

18965941 is a deficient number, since it is larger than the sum of its proper divisors (512631).

18965941 is an equidigital number, since it uses as much as digits as its factorization.

18965941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512630.

The product of its digits is 77760, while the sum is 43.

The square root of 18965941 is about 4354.9903559021. The cubic root of 18965941 is about 266.6806254846.

The spelling of 18965941 in words is "eighteen million, nine hundred sixty-five thousand, nine hundred forty-one".