21341205 has 48 divisors (see below), whose sum is σ = 40376640. Its totient is φ = 10692864.

The previous prime is 21341191. The next prime is 21341249. The reversal of 21341205 is 50214312.

It is not a de Polignac number, because 21341205 - 2⁶ = 21341141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38742 + ... + 39288.

It is an arithmetic number, because the mean of its divisors is an integer number (841180).

Almost surely, 2^21341205 is an apocalyptic number.

It is an amenable number.

21341205 is a deficient number, since it is larger than the sum of its proper divisors (19035435).

21341205 is a wasteful number, since it uses less digits than its factorization.

21341205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 21341205 is about 4619.6542078385. The cubic root of 21341205 is about 277.3786174757.

Adding to 21341205 its reverse (50214312), we get a palindrome (71555517).

The spelling of 21341205 in words is "twenty-one million, three hundred forty-one thousand, two hundred five".