18659941 has 4 divisors (see below), whose sum is σ = 18708300. Its totient is φ = 18611584.

The previous prime is 18659911. The next prime is 18659947. The reversal of 18659941 is 14995681.

18659941 = 3054² + 3055².

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 9326916 + 9333025 = 3054^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 18659941 - 2²¹ = 16562789 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 (18659947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23596 + ... + 24373.

It is an arithmetic number, because the mean of its divisors is an integer number (4677075).

Almost surely, 2^18659941 is an apocalyptic number.

18659941 is the 3055-th centered square number.

It is an amenable number.

18659941 is a deficient number, since it is larger than the sum of its proper divisors (48359).

18659941 is an equidigital number, since it uses as much as digits as its factorization.

18659941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48358.

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

The square root of 18659941 is about 4319.7153841428. The cubic root of 18659941 is about 265.2386173988.

It can be divided in two parts, 18659 and 941, that added together give a square (19600 = 140²).

The spelling of 18659941 in words is "eighteen million, six hundred fifty-nine thousand, nine hundred forty-one".