18406336 has 28 divisors (see below), whose sum is σ = 39336472. Its totient is φ = 8494848.

The previous prime is 18406331. The next prime is 18406337. The reversal of 18406336 is 63360481.

It is a junction number, because it is equal to n+sod(n) for n = 18406298 and 18406307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18406331) 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 3 ways as a sum of consecutive naturals, for example, 10230 + ... + 11893.

It is an arithmetic number, because the mean of its divisors is an integer number (1404874).

Almost surely, 2^18406336 is an apocalyptic number.

18406336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18406336 is an abundant number, since it is smaller than the sum of its proper divisors (20930136).

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

18406336 is a wasteful number, since it uses less digits than its factorization.

18406336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22148 (or 22138 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 18406336 is about 4290.2605981455. The cubic root of 18406336 is about 264.0315236308.

The spelling of 18406336 in words is "eighteen million, four hundred six thousand, three hundred thirty-six".