20021201344 has 56 divisors (see below), whose sum is σ = 40734435168. Its totient is φ = 9757839360.

The previous prime is 20021201323. The next prime is 20021201357. The reversal of 20021201344 is 44310212002.

It is a congruent number.

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, 3794292 + ... + 3799564.

It is an arithmetic number, because the mean of its divisors is an integer number (727400628).

Almost surely, 2^20021201344 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 20021201344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20367217584).

20021201344 is an abundant number, since it is smaller than the sum of its proper divisors (20713233824).

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

20021201344 is a wasteful number, since it uses less digits than its factorization.

20021201344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773 (or 6763 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20021201344 its reverse (44310212002), we get a palindrome (64331413346).

The spelling of 20021201344 in words is "twenty billion, twenty-one million, two hundred one thousand, three hundred forty-four".