18361336 has 16 divisors (see below), whose sum is σ = 39345840. Its totient is φ = 7869120.

The previous prime is 18361333. The next prime is 18361339. The reversal of 18361336 is 63316381.

It is an interprime number because it is at equal distance from previous prime (18361333) and next prime (18361339).

It is a junction number, because it is equal to n+sod(n) for n = 18361298 and 18361307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18361333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163885 + ... + 163996.

It is an arithmetic number, because the mean of its divisors is an integer number (2459115).

Almost surely, 2^18361336 is an apocalyptic number.

It is an amenable number.

18361336 is an abundant number, since it is smaller than the sum of its proper divisors (20984504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18361336 is a wasteful number, since it uses less digits than its factorization.

18361336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327894 (or 327890 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 18361336 is about 4285.0129521391. The cubic root of 18361336 is about 263.8161790462.

The spelling of 18361336 in words is "eighteen million, three hundred sixty-one thousand, three hundred thirty-six".