18016959 has 8 divisors (see below), whose sum is σ = 25287040. Its totient is φ = 11379096.

The previous prime is 18016951. The next prime is 18016961. The reversal of 18016959 is 95961081.

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

It is not a de Polignac number, because 18016959 - 2³ = 18016951 is a prime.

It is a super-2 number, since 2×18016959² = 649221623215362, 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 (18016951) 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, 157987 + ... + 158100.

It is an arithmetic number, because the mean of its divisors is an integer number (3160880).

Almost surely, 2^18016959 is an apocalyptic number.

18016959 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18016959 is a deficient number, since it is larger than the sum of its proper divisors (7270081).

18016959 is a wasteful number, since it uses less digits than its factorization.

18016959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316109.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 18016959 is about 4244.6388538956. The cubic root of 18016959 is about 262.1564194253.

The spelling of 18016959 in words is "eighteen million, sixteen thousand, nine hundred fifty-nine".