18941365 has 4 divisors (see below), whose sum is σ = 22729644. Its totient is φ = 15153088.

The previous prime is 18941359. The next prime is 18941387. The reversal of 18941365 is 56314981.

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 10909809 + 8031556 = 3303^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 18941365 - 2³ = 18941357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894132 + ... + 1894141.

It is an arithmetic number, because the mean of its divisors is an integer number (5682411).

Almost surely, 2^18941365 is an apocalyptic number.

It is an amenable number.

18941365 is a deficient number, since it is larger than the sum of its proper divisors (3788279).

18941365 is an equidigital number, since it uses as much as digits as its factorization.

18941365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788278.

The product of its digits is 25920, while the sum is 37.

The square root of 18941365 is about 4352.1678506234. The cubic root of 18941365 is about 266.5653877548.

It can be divided in two parts, 18941 and 365, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 18941365 in words is "eighteen million, nine hundred forty-one thousand, three hundred sixty-five".