18402016 has 12 divisors (see below), whose sum is σ = 36229032. Its totient is φ = 9200992.

The previous prime is 18402011. The next prime is 18402031. The reversal of 18402016 is 61020481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18402011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287500 + ... + 287563.

It is an arithmetic number, because the mean of its divisors is an integer number (3019086).

Almost surely, 2^18402016 is an apocalyptic number.

18402016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18402016 is a deficient number, since it is larger than the sum of its proper divisors (17827016).

18402016 is an equidigital number, since it uses as much as digits as its factorization.

18402016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575073 (or 575065 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18402016 is about 4289.7571026808. The cubic root of 18402016 is about 264.0108657909.

Adding to 18402016 its reverse (61020481), we get a palindrome (79422497).

The spelling of 18402016 in words is "eighteen million, four hundred two thousand, sixteen".