20411216 has 20 divisors (see below), whose sum is σ = 45196512. Its totient is φ = 8747616.

The previous prime is 20411147. The next prime is 20411221. The reversal of 20411216 is 61211402.

It is a junction number, because it is equal to n+sod(n) for n = 20411194 and 20411203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91010 + ... + 91233.

Almost surely, 2^20411216 is an apocalyptic number.

It is an amenable number.

20411216 is an abundant number, since it is smaller than the sum of its proper divisors (24785296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20411216 is a wasteful number, since it uses less digits than its factorization.

20411216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182258 (or 182252 counting only the distinct ones).

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

The square root of 20411216 is about 4517.8773777074. The cubic root of 20411216 is about 273.2895084738.

Adding to 20411216 its reverse (61211402), we get a palindrome (81622618).

The spelling of 20411216 in words is "twenty million, four hundred eleven thousand, two hundred sixteen".