16921056 has 24 divisors (see below), whose sum is σ = 44418024. Its totient is φ = 5640320.

The previous prime is 16921019. The next prime is 16921061. The reversal of 16921056 is 65012961.

It is a tau number, because it is divible by the number of its divisors (24).

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88035 + ... + 88226.

It is an arithmetic number, because the mean of its divisors is an integer number (1850751).

Almost surely, 2^16921056 is an apocalyptic number.

16921056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16921056 is an abundant number, since it is smaller than the sum of its proper divisors (27496968).

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

16921056 is a wasteful number, since it uses less digits than its factorization.

16921056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176274 (or 176266 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 16921056 is about 4113.5211194304. The cubic root of 16921056 is about 256.7295271533.

The spelling of 16921056 in words is "sixteen million, nine hundred twenty-one thousand, fifty-six".