20021600448 has 84 divisors (see below), whose sum is σ = 57444643048. Its totient is φ = 6667315200.

The previous prime is 20021600447. The next prime is 20021600461. The reversal of 20021600448 is 84400612002.

20021600448 is a `hidden beast` number, since 2 + 0 + 0 + 216 + 0 + 0 + 448 = 666.

It is a super-3 number, since 3×20021600448³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20021600447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 588840 + ... + 621912.

Almost surely, 2^20021600448 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 20021600448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28722321524).

20021600448 is an abundant number, since it is smaller than the sum of its proper divisors (37423042600).

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

20021600448 is a wasteful number, since it uses less digits than its factorization.

20021600448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34142 (or 34129 counting only the distinct ones).

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

The spelling of 20021600448 in words is "twenty billion, twenty-one million, six hundred thousand, four hundred forty-eight".