20216448 has 192 divisors, whose sum is σ = 70012800. Its totient is φ = 5474304.

The previous prime is 20216447. The next prime is 20216477. The reversal of 20216448 is 84461202.

20216448 is a `hidden beast` number, since 2 + 0 + 216 + 448 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20216447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185418 + ... + 185526.

It is an arithmetic number, because the mean of its divisors is an integer number (364650).

Almost surely, 2^20216448 is an apocalyptic number.

20216448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20216448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35006400).

20216448 is an abundant number, since it is smaller than the sum of its proper divisors (49796352).

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

20216448 is a wasteful number, since it uses less digits than its factorization.

20216448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20216448 is about 4496.2704544989. The cubic root of 20216448 is about 272.4174673604.

The spelling of 20216448 in words is "twenty million, two hundred sixteen thousand, four hundred forty-eight".