16421118 has 32 divisors (see below), whose sum is σ = 38552064. Its totient is φ = 4564512.

The previous prime is 16421113. The next prime is 16421129. The reversal of 16421118 is 81112461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3730 + ... + 6837.

It is an arithmetic number, because the mean of its divisors is an integer number (1204752).

Almost surely, 2^16421118 is an apocalyptic number.

16421118 is an abundant number, since it is smaller than the sum of its proper divisors (22130946).

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

16421118 is a wasteful number, since it uses less digits than its factorization.

16421118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616.

The product of its digits is 384, while the sum is 24.

The square root of 16421118 is about 4052.2978666431. The cubic root of 16421118 is about 254.1758242811.

Adding to 16421118 its reverse (81112461), we get a palindrome (97533579).

The spelling of 16421118 in words is "sixteen million, four hundred twenty-one thousand, one hundred eighteen".