20811416 has 24 divisors (see below), whose sum is σ = 40335660. Its totient is φ = 10066320.

The previous prime is 20811409. The next prime is 20811419. The reversal of 20811416 is 61411802.

It is a junction number, because it is equal to n+sod(n) for n = 20811391 and 20811400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20811419) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6335 + ... + 9041.

Almost surely, 2^20811416 is an apocalyptic number.

It is an amenable number.

20811416 is a deficient number, since it is larger than the sum of its proper divisors (19524244).

20811416 is a wasteful number, since it uses less digits than its factorization.

20811416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 20811416 is about 4561.9530905085. The cubic root of 20811416 is about 275.0640776301.

The spelling of 20811416 in words is "twenty million, eight hundred eleven thousand, four hundred sixteen".