21341204 has 6 divisors (see below), whose sum is σ = 37347114. Its totient is φ = 10670600.

The previous prime is 21341191. The next prime is 21341249. The reversal of 21341204 is 40214312.

It can be written as a sum of positive squares in only one way, i.e., 11916304 + 9424900 = 3452^2 + 3070^2 .

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, 2667647 + ... + 2667654.

It is an arithmetic number, because the mean of its divisors is an integer number (6224519).

Almost surely, 2^21341204 is an apocalyptic number.

It is an amenable number.

21341204 is a deficient number, since it is larger than the sum of its proper divisors (16005910).

21341204 is a wasteful number, since it uses less digits than its factorization.

21341204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335305 (or 5335303 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21341204 is about 4619.6540996053. The cubic root of 21341204 is about 277.3786131433.

Adding to 21341204 its reverse (40214312), we get a palindrome (61555516).

The spelling of 21341204 in words is "twenty-one million, three hundred forty-one thousand, two hundred four".