16418320 has 40 divisors (see below), whose sum is σ = 39836736. Its totient is φ = 6281088.

The previous prime is 16418309. The next prime is 16418323. The reversal of 16418320 is 2381461.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×16418320² = 539122463244800, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16418323) 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, 2622 + ... + 6301.

Almost surely, 2^16418320 is an apocalyptic number.

16418320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16418320 is an abundant number, since it is smaller than the sum of its proper divisors (23418416).

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

16418320 is a wasteful number, since it uses less digits than its factorization.

16418320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8959 (or 8953 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 16418320 is about 4051.9526157150. The cubic root of 16418320 is about 254.1613870921.

Adding to 16418320 its reverse (2381461), we get a palindrome (18799781).

The spelling of 16418320 in words is "sixteen million, four hundred eighteen thousand, three hundred twenty".