18189696 has 128 divisors (see below), whose sum is σ = 56597760. Its totient is φ = 5068800.

The previous prime is 18189683. The next prime is 18189701. The reversal of 18189696 is 69698181.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

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

Its product of digits (186624) is a multiple of the sum of its prime factors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180046 + ... + 180146.

It is an arithmetic number, because the mean of its divisors is an integer number (442170).

Almost surely, 2^18189696 is an apocalyptic number.

18189696 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 18189696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28298880).

18189696 is an abundant number, since it is smaller than the sum of its proper divisors (38408064).

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

18189696 is a wasteful number, since it uses less digits than its factorization.

18189696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 180 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 18189696 is about 4264.9379831364. The cubic root of 18189696 is about 262.9915614597.

The spelling of 18189696 in words is "eighteen million, one hundred eighty-nine thousand, six hundred ninety-six".