16974918 has 48 divisors (see below), whose sum is σ = 39312000. Its totient is φ = 5281920.

The previous prime is 16974917. The next prime is 16974931. The reversal of 16974918 is 81947961.

It is a happy number.

It is a super-2 number, since 2×16974918² = 576295682213448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16974913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15658 + ... + 16706.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^16974918 is an apocalyptic number.

16974918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16974918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19656000).

16974918 is an abundant number, since it is smaller than the sum of its proper divisors (22337082).

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

16974918 is a wasteful number, since it uses less digits than its factorization.

16974918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1114 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 16974918 is about 4120.0628635981. The cubic root of 16974918 is about 257.0016401860.

The spelling of 16974918 in words is "sixteen million, nine hundred seventy-four thousand, nine hundred eighteen".