16981011 has 24 divisors (see below), whose sum is σ = 26614224. Its totient is φ = 10391040.

The previous prime is 16981009. The next prime is 16981021. The reversal of 16981011 is 11018961.

It is not a de Polignac number, because 16981011 - 2¹ = 16981009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16981021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4920 + ... + 7626.

It is an arithmetic number, because the mean of its divisors is an integer number (1108926).

Almost surely, 2^16981011 is an apocalyptic number.

16981011 is a deficient number, since it is larger than the sum of its proper divisors (9633213).

16981011 is a wasteful number, since it uses less digits than its factorization.

16981011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771 (or 2768 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 16981011 is about 4120.8022277222. The cubic root of 16981011 is about 257.0323860129.

Adding to 16981011 its reverse (11018961), we get a palindrome (27999972).

The spelling of 16981011 in words is "sixteen million, nine hundred eighty-one thousand, eleven".