16538863 has 8 divisors (see below), whose sum is σ = 18827136. Its totient is φ = 14381400.

The previous prime is 16538861. The next prime is 16538891. The reversal of 16538863 is 36883561.

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

It is not a de Polignac number, because 16538863 - 2¹ = 16538861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16538861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32433 + ... + 32938.

It is an arithmetic number, because the mean of its divisors is an integer number (2353392).

Almost surely, 2^16538863 is an apocalyptic number.

16538863 is a deficient number, since it is larger than the sum of its proper divisors (2288273).

16538863 is a wasteful number, since it uses less digits than its factorization.

16538863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65405.

The product of its digits is 103680, while the sum is 40.

The square root of 16538863 is about 4066.8000934396. The cubic root of 16538863 is about 254.7818870528.

The spelling of 16538863 in words is "sixteen million, five hundred thirty-eight thousand, eight hundred sixty-three".