20444213408 has 96 divisors (see below), whose sum is σ = 43589145600. Its totient is φ = 9408040704.

The previous prime is 20444213393. The next prime is 20444213437. The reversal of 20444213408 is 80431244402.

It is a Harshad number since it is a multiple of its sum of digits (32).

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 15 ways as a sum of consecutive naturals, for example, 3969491 + ... + 3974637.

It is an arithmetic number, because the mean of its divisors is an integer number (454053600).

Almost surely, 2^20444213408 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 20444213408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21794572800).

20444213408 is an abundant number, since it is smaller than the sum of its proper divisors (23144932192).

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

20444213408 is a wasteful number, since it uses less digits than its factorization.

20444213408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5362 (or 5354 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The spelling of 20444213408 in words is "twenty billion, four hundred forty-four million, two hundred thirteen thousand, four hundred eight".