16981437 has 16 divisors (see below), whose sum is σ = 24932160. Its totient is φ = 10195200.

The previous prime is 16981427. The next prime is 16981441. The reversal of 16981437 is 73418961.

It is not a de Polignac number, because 16981437 - 2¹² = 16977341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16981395 and 16981404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16981427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1237 + ... + 5957.

It is an arithmetic number, because the mean of its divisors is an integer number (1558260).

Almost surely, 2^16981437 is an apocalyptic number.

It is an amenable number.

16981437 is a deficient number, since it is larger than the sum of its proper divisors (7950723).

16981437 is a wasteful number, since it uses less digits than its factorization.

16981437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844.

The product of its digits is 36288, while the sum is 39.

The square root of 16981437 is about 4120.8539163625. The cubic root of 16981437 is about 257.0345353722.

The spelling of 16981437 in words is "sixteen million, nine hundred eighty-one thousand, four hundred thirty-seven".