16421330 has 16 divisors (see below), whose sum is σ = 30188160. Its totient is φ = 6428592.

The previous prime is 16421323. The next prime is 16421341. The reversal of 16421330 is 3312461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17000 + ... + 17939.

It is an arithmetic number, because the mean of its divisors is an integer number (1886760).

Almost surely, 2^16421330 is an apocalyptic number.

16421330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16421330 is a deficient number, since it is larger than the sum of its proper divisors (13766830).

16421330 is a wasteful number, since it uses less digits than its factorization.

16421330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34993.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 16421330 is about 4052.3240245568. The cubic root of 16421330 is about 254.1769180971.

Adding to 16421330 its reverse (3312461), we get a palindrome (19733791).

The spelling of 16421330 in words is "sixteen million, four hundred twenty-one thousand, three hundred thirty".