18465841 has 2 divisors, whose sum is σ = 18465842. Its totient is φ = 18465840.

The previous prime is 18465833. The next prime is 18465851. The reversal of 18465841 is 14856481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 6355441 = 3480^2 + 2521^2 .

It is an emirp because it is prime and its reverse (14856481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18465841 - 2³ = 18465833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18465841.

It is not a weakly prime, because it can be changed into another prime (18465851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9232920 + 9232921.

It is an arithmetic number, because the mean of its divisors is an integer number (9232921).

Almost surely, 2^18465841 is an apocalyptic number.

It is an amenable number.

18465841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18465841 is an equidigital number, since it uses as much as digits as its factorization.

18465841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 37.

The square root of 18465841 is about 4297.1898957342. The cubic root of 18465841 is about 264.3157427079.

It can be divided in two parts, 18465 and 841, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 18465841 in words is "eighteen million, four hundred sixty-five thousand, eight hundred forty-one".