18366836 has 6 divisors (see below), whose sum is σ = 32141970. Its totient is φ = 9183416.

The previous prime is 18366833. The next prime is 18366839. The reversal of 18366836 is 63866381.

It is an interprime number because it is at equal distance from previous prime (18366833) and next prime (18366839).

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 5262436 = 3620^2 + 2294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18366793 and 18366802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2295851 + ... + 2295858.

It is an arithmetic number, because the mean of its divisors is an integer number (5356995).

Almost surely, 2^18366836 is an apocalyptic number.

It is an amenable number.

18366836 is a deficient number, since it is larger than the sum of its proper divisors (13775134).

18366836 is a wasteful number, since it uses less digits than its factorization.

18366836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591713 (or 4591711 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 18366836 is about 4285.6546757759. The cubic root of 18366836 is about 263.8425178001.

The spelling of 18366836 in words is "eighteen million, three hundred sixty-six thousand, eight hundred thirty-six".