18365941 has 16 divisors (see below), whose sum is σ = 20641536. Its totient is φ = 16200000.

The previous prime is 18365929. The next prime is 18365947. The reversal of 18365941 is 14956381.

It is a 5-Lehmer number, since φ(18365941) divides (18365941-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 18365941 - 2⁷ = 18365813 is a prime.

It is a deceptive number, since it divides R_18365940.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18365941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18365947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67636 + ... + 67906.

It is an arithmetic number, because the mean of its divisors is an integer number (1290096).

Almost surely, 2^18365941 is an apocalyptic number.

18365941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18365941 is a deficient number, since it is larger than the sum of its proper divisors (2275595).

18365941 is a wasteful number, since it uses less digits than its factorization.

18365941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444.

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

The square root of 18365941 is about 4285.5502563848. The cubic root of 18365941 is about 263.8382321248.

It can be divided in two parts, 18365 and 941, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 18365941 in words is "eighteen million, three hundred sixty-five thousand, nine hundred forty-one".