21141413 has 4 divisors (see below), whose sum is σ = 21251148. Its totient is φ = 21031680.

The previous prime is 21141403. The next prime is 21141431. The reversal of 21141413 is 31414112.

It is a happy number.

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 3694084 + 17447329 = 1922^2 + 4177^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141413 - 2⁴ = 21141397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21141391 and 21141400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141403) 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, 54578 + ... + 54963.

It is an arithmetic number, because the mean of its divisors is an integer number (5312787).

Almost surely, 2^21141413 is an apocalyptic number.

It is an amenable number.

21141413 is a deficient number, since it is larger than the sum of its proper divisors (109735).

21141413 is a wasteful number, since it uses less digits than its factorization.

21141413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109734.

The product of its digits is 96, while the sum is 17.

The square root of 21141413 is about 4597.9792300531. The cubic root of 21141413 is about 276.5103148773.

Adding to 21141413 its reverse (31414112), we get a palindrome (52555525).

The spelling of 21141413 in words is "twenty-one million, one hundred forty-one thousand, four hundred thirteen".