21341413 has 4 divisors (see below), whose sum is σ = 21376620. Its totient is φ = 21306208.

The previous prime is 21341407. The next prime is 21341479. The reversal of 21341413 is 31414312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 21141604 = 447^2 + 4598^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341413 - 2⁵ = 21341381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21345413) 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, 16678 + ... + 17911.

It is an arithmetic number, because the mean of its divisors is an integer number (5344155).

Almost surely, 2^21341413 is an apocalyptic number.

It is an amenable number.

21341413 is a deficient number, since it is larger than the sum of its proper divisors (35207).

21341413 is an equidigital number, since it uses as much as digits as its factorization.

21341413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35206.

The product of its digits is 288, while the sum is 19.

The square root of 21341413 is about 4619.6767202912. The cubic root of 21341413 is about 277.3795186208.

Adding to 21341413 its reverse (31414312), we get a palindrome (52755725).

The spelling of 21341413 in words is "twenty-one million, three hundred forty-one thousand, four hundred thirteen".