16991853 has 8 divisors (see below), whose sum is σ = 23083488. Its totient is φ = 11114064.

The previous prime is 16991851. The next prime is 16991861. The reversal of 16991853 is 35819961.

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

It is not a de Polignac number, because 16991853 - 2¹ = 16991851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53275 + ... + 53592.

It is an arithmetic number, because the mean of its divisors is an integer number (2885436).

Almost surely, 2^16991853 is an apocalyptic number.

It is an amenable number.

16991853 is a deficient number, since it is larger than the sum of its proper divisors (6091635).

16991853 is a wasteful number, since it uses less digits than its factorization.

16991853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106923.

The product of its digits is 58320, while the sum is 42.

The square root of 16991853 is about 4122.1175383533. The cubic root of 16991853 is about 257.0870775396.

The spelling of 16991853 in words is "sixteen million, nine hundred ninety-one thousand, eight hundred fifty-three".