20110001320 has 96 divisors (see below), whose sum is σ = 47551989600. Its totient is φ = 7651712640.

The previous prime is 20110001273. The next prime is 20110001377. The reversal of 20110001320 is 2310001102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20110001297 and 20110001306.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2263527 + ... + 2272393.

It is an arithmetic number, because the mean of its divisors is an integer number (495333225).

Almost surely, 2^20110001320 is an apocalyptic number.

20110001320 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 20110001320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23775994800).

20110001320 is an abundant number, since it is smaller than the sum of its proper divisors (27441988280).

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

20110001320 is a wasteful number, since it uses less digits than its factorization.

20110001320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8999 (or 8964 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20110001320 its reverse (2310001102), we get a palindrome (22420002422).

The spelling of 20110001320 in words is "twenty billion, one hundred ten million, one thousand, three hundred twenty".