20044416 has 64 divisors (see below), whose sum is σ = 60857280. Its totient is φ = 5726208.

The previous prime is 20044397. The next prime is 20044447. The reversal of 20044416 is 61444002.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20044416² = 803557225562112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20044392 and 20044401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041 + ... + 6416.

It is an arithmetic number, because the mean of its divisors is an integer number (950895).

Almost surely, 2^20044416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20044416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30428640).

20044416 is an abundant number, since it is smaller than the sum of its proper divisors (40812864).

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

20044416 is an equidigital number, since it uses as much as digits as its factorization.

20044416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7481 (or 7469 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20044416 is about 4477.0990607759. The cubic root of 20044416 is about 271.6425523822.

Adding to 20044416 its reverse (61444002), we get a palindrome (81488418).

The spelling of 20044416 in words is "twenty million, forty-four thousand, four hundred sixteen".