16986420 has 144 divisors (see below), whose sum is σ = 58810752. Its totient is φ = 3928320.

The previous prime is 16986391. The next prime is 16986421. The reversal of 16986420 is 2468961.

16986420 is a `hidden beast` number, since 1 + 6 + 9 + 8 + 642 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16986421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45354 + ... + 45726.

It is an arithmetic number, because the mean of its divisors is an integer number (408408).

Almost surely, 2^16986420 is an apocalyptic number.

16986420 is a gapful number since it is divisible by the number (10) 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 16986420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29405376).

16986420 is an abundant number, since it is smaller than the sum of its proper divisors (41824332).

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

16986420 is a wasteful number, since it uses less digits than its factorization.

16986420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 16986420 is about 4121.4584797132. The cubic root of 16986420 is about 257.0596741523.

It can be divided in two parts, 1698 and 6420, that added together give a palindrome (8118).

The spelling of 16986420 in words is "sixteen million, nine hundred eighty-six thousand, four hundred twenty".