16802981 has 8 divisors (see below), whose sum is σ = 18516960. Its totient is φ = 15149232.

The previous prime is 16802911. The next prime is 16802993. The reversal of 16802981 is 18920861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16802981 is a prime.

It is a super-2 number, since 2×16802981² = 564680340972722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16802911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14471 + ... + 15588.

It is an arithmetic number, because the mean of its divisors is an integer number (2314620).

Almost surely, 2^16802981 is an apocalyptic number.

It is an amenable number.

16802981 is a deficient number, since it is larger than the sum of its proper divisors (1713979).

16802981 is a wasteful number, since it uses less digits than its factorization.

16802981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30115.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 16802981 is about 4099.1439350186. The cubic root of 16802981 is about 256.1309805401.

The spelling of 16802981 in words is "sixteen million, eight hundred two thousand, nine hundred eighty-one".