20023120320 has 224 divisors, whose sum is σ = 73473868800. Its totient is φ = 4525154304.

The previous prime is 20023120291. The next prime is 20023120361. The reversal of 20023120320 is 2302132002.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20023120320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581341 + ... + 614819.

Almost surely, 2^20023120320 is an apocalyptic number.

20023120320 is a gapful number since it is divisible by the number (20) 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 20023120320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36736934400).

20023120320 is an abundant number, since it is smaller than the sum of its proper divisors (53450748480).

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

20023120320 is a wasteful number, since it uses less digits than its factorization.

20023120320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33595 (or 33585 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20023120320 its reverse (2302132002), we get a palindrome (22325252322).

The spelling of 20023120320 in words is "twenty billion, twenty-three million, one hundred twenty thousand, three hundred twenty".