18161412 has 24 divisors (see below), whose sum is σ = 43744512. Its totient is φ = 5858400.

The previous prime is 18161399. The next prime is 18161441. The reversal of 18161412 is 21416181.

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 7 ways as a sum of consecutive naturals, for example, 24039 + ... + 24782.

It is an arithmetic number, because the mean of its divisors is an integer number (1822688).

Almost surely, 2^18161412 is an apocalyptic number.

18161412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18161412 is an abundant number, since it is smaller than the sum of its proper divisors (25583100).

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

18161412 is a wasteful number, since it uses less digits than its factorization.

18161412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48859 (or 48857 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

The square root of 18161412 is about 4261.6208184211. The cubic root of 18161412 is about 262.8551781629.

Adding to 18161412 its reverse (21416181), we get a palindrome (39577593).

The spelling of 18161412 in words is "eighteen million, one hundred sixty-one thousand, four hundred twelve".