18359968 has 48 divisors (see below), whose sum is σ = 40382496. Its totient is φ = 8144640.

The previous prime is 18359959. The next prime is 18359977. The reversal of 18359968 is 86995381.

It is an interprime number because it is at equal distance from previous prime (18359959) and next prime (18359977).

It is a super-2 number, since 2×18359968² = 674176849922048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14530 + ... + 15742.

It is an arithmetic number, because the mean of its divisors is an integer number (841302).

Almost surely, 2^18359968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18359968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20191248).

18359968 is an abundant number, since it is smaller than the sum of its proper divisors (22022528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18359968 is a wasteful number, since it uses less digits than its factorization.

18359968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1269 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 18359968 is about 4284.8533230439. The cubic root of 18359968 is about 263.8096270630.

The spelling of 18359968 in words is "eighteen million, three hundred fifty-nine thousand, nine hundred sixty-eight".