16421204 has 12 divisors (see below), whose sum is σ = 29131284. Its totient is φ = 8097984.

The previous prime is 16421203. The next prime is 16421213. The reversal of 16421204 is 40212461.

16421204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9120400 + 7300804 = 3020^2 + 2702^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27827 + ... + 28410.

It is an arithmetic number, because the mean of its divisors is an integer number (2427607).

Almost surely, 2^16421204 is an apocalyptic number.

It is an amenable number.

16421204 is a deficient number, since it is larger than the sum of its proper divisors (12710080).

16421204 is a wasteful number, since it uses less digits than its factorization.

16421204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56314 (or 56312 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 16421204 is about 4052.3084778926. The cubic root of 16421204 is about 254.1762680000.

Adding to 16421204 its reverse (40212461), we get a palindrome (56633665).

The spelling of 16421204 in words is "sixteen million, four hundred twenty-one thousand, two hundred four".