21416204 has 6 divisors (see below), whose sum is σ = 37478364. Its totient is φ = 10708100.

The previous prime is 21416183. The next prime is 21416281. The reversal of 21416204 is 40261412.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2677022 + ... + 2677029.

It is an arithmetic number, because the mean of its divisors is an integer number (6246394).

Almost surely, 2^21416204 is an apocalyptic number.

It is an amenable number.

21416204 is a deficient number, since it is larger than the sum of its proper divisors (16062160).

21416204 is a wasteful number, since it uses less digits than its factorization.

21416204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5354055 (or 5354053 counting only the distinct ones).

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

The square root of 21416204 is about 4627.7644711027. The cubic root of 21416204 is about 277.7031664263.

Adding to 21416204 its reverse (40261412), we get a palindrome (61677616).

The spelling of 21416204 in words is "twenty-one million, four hundred sixteen thousand, two hundred four".