18161696 has 48 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 7687680.

The previous prime is 18161683. The next prime is 18161707. The reversal of 18161696 is 69616181.

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

It is a congruent number.

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, 19481 + ... + 20391.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^18161696 is an apocalyptic number.

18161696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18161696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684160).

18161696 is an abundant number, since it is smaller than the sum of its proper divisors (23206624).

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

18161696 is an equidigital number, since it uses as much as digits as its factorization.

18161696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1009 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 18161696 is about 4261.6541389465. The cubic root of 18161696 is about 262.8565482928.

The spelling of 18161696 in words is "eighteen million, one hundred sixty-one thousand, six hundred ninety-six".