20814413 has 4 divisors (see below), whose sum is σ = 20892060. Its totient is φ = 20736768.

The previous prime is 20814403. The next prime is 20814439. The reversal of 20814413 is 31441802.

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 3988009 + 16826404 = 1997^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 20814413 - 2⁴ = 20814397 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 (20814403) 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, 38420 + ... + 38957.

It is an arithmetic number, because the mean of its divisors is an integer number (5223015).

Almost surely, 2^20814413 is an apocalyptic number.

It is an amenable number.

20814413 is a deficient number, since it is larger than the sum of its proper divisors (77647).

20814413 is an equidigital number, since it uses as much as digits as its factorization.

20814413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77646.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20814413 is about 4562.2815564145. The cubic root of 20814413 is about 275.0772807598.

The spelling of 20814413 in words is "twenty million, eight hundred fourteen thousand, four hundred thirteen".