16197818 has 32 divisors (see below), whose sum is σ = 30414720. Its totient is φ = 6298560.

The previous prime is 16197793. The next prime is 16197827. The reversal of 16197818 is 81879161.

It is a super-2 number, since 2×16197818² = 524738615922248, which contains 22 as substring.

It is a Curzon 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, 10373 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (950460).

Almost surely, 2^16197818 is an apocalyptic number.

16197818 is a deficient number, since it is larger than the sum of its proper divisors (14216902).

16197818 is a wasteful number, since it uses less digits than its factorization.

16197818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542.

The product of its digits is 24192, while the sum is 41.

The square root of 16197818 is about 4024.6512892423. The cubic root of 16197818 is about 253.0184387713.

It can be divided in two parts, 161 and 97818, that added together give a palindrome (97979).

The spelling of 16197818 in words is "sixteen million, one hundred ninety-seven thousand, eight hundred eighteen".