20216413 has 4 divisors (see below), whose sum is σ = 23104480. Its totient is φ = 17328348.

The previous prime is 20216411. The next prime is 20216447. The reversal of 20216413 is 31461202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20216413 - 2¹ = 20216411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216411) 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, 1444023 + ... + 1444036.

It is an arithmetic number, because the mean of its divisors is an integer number (5776120).

Almost surely, 2^20216413 is an apocalyptic number.

It is an amenable number.

20216413 is a deficient number, since it is larger than the sum of its proper divisors (2888067).

20216413 is an equidigital number, since it uses as much as digits as its factorization.

20216413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888066.

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

The square root of 20216413 is about 4496.2665623826. The cubic root of 20216413 is about 272.4173101515.

Adding to 20216413 its reverse (31461202), we get a palindrome (51677615).

The spelling of 20216413 in words is "twenty million, two hundred sixteen thousand, four hundred thirteen".