16921080 has 96 divisors (see below), whose sum is σ = 60006960. Its totient is φ = 4101120.

The previous prime is 16921067. The next prime is 16921097. The reversal of 16921080 is 8012961.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1824 + ... + 6096.

Almost surely, 2^16921080 is an apocalyptic number.

16921080 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 16921080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30003480).

16921080 is an abundant number, since it is smaller than the sum of its proper divisors (43085880).

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

16921080 is a wasteful number, since it uses less digits than its factorization.

16921080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4301 (or 4294 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 16921080 is about 4113.5240366382. The cubic root of 16921080 is about 256.7296485308.

It can be divided in two parts, 1692 and 1080, that added together give a palindrome (2772).

The spelling of 16921080 in words is "sixteen million, nine hundred twenty-one thousand, eighty".