21110204 has 6 divisors (see below), whose sum is σ = 36942864. Its totient is φ = 10555100.

The previous prime is 21110189. The next prime is 21110227. The reversal of 21110204 is 40201112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2638772 + ... + 2638779.

It is an arithmetic number, because the mean of its divisors is an integer number (6157144).

Almost surely, 2^21110204 is an apocalyptic number.

It is an amenable number.

21110204 is a deficient number, since it is larger than the sum of its proper divisors (15832660).

21110204 is a wasteful number, since it uses less digits than its factorization.

21110204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5277555 (or 5277553 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 21110204 is about 4594.5842031679. The cubic root of 21110204 is about 276.3741861608.

Adding to 21110204 its reverse (40201112), we get a palindrome (61311316).

The spelling of 21110204 in words is "twenty-one million, one hundred ten thousand, two hundred four".