18361416 has 16 divisors (see below), whose sum is σ = 45903600. Its totient is φ = 6120464.

The previous prime is 18361351. The next prime is 18361423. The reversal of 18361416 is 61416381.

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

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, 382506 + ... + 382553.

It is an arithmetic number, because the mean of its divisors is an integer number (2868975).

Almost surely, 2^18361416 is an apocalyptic number.

It is an amenable number.

18361416 is an abundant number, since it is smaller than the sum of its proper divisors (27542184).

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

18361416 is a wasteful number, since it uses less digits than its factorization.

18361416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765068 (or 765064 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 18361416 is about 4285.0222869899. The cubic root of 18361416 is about 263.8165621931.

Adding to 18361416 its reverse (61416381), we get a palindrome (79777797).

The spelling of 18361416 in words is "eighteen million, three hundred sixty-one thousand, four hundred sixteen".