18197016 has 64 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 5846400.

The previous prime is 18197009. The next prime is 18197051. The reversal of 18197016 is 61079181.

It is a super-2 number, since 2×18197016² = 662262782608512, which contains 22 as substring.

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, 100446 + ... + 100626.

It is an arithmetic number, because the mean of its divisors is an integer number (737100).

Almost surely, 2^18197016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18197016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23587200).

18197016 is an abundant number, since it is smaller than the sum of its proper divisors (28977384).

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

18197016 is a wasteful number, since it uses less digits than its factorization.

18197016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 18197016 is about 4265.7960570098. The cubic root of 18197016 is about 263.0268349107.

The spelling of 18197016 in words is "eighteen million, one hundred ninety-seven thousand, sixteen".