20113503320 has 64 divisors (see below), whose sum is σ = 47010823200. Its totient is φ = 7735633920.

The previous prime is 20113503307. The next prime is 20113503323. The reversal of 20113503320 is 2330531102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20113503292 and 20113503301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113503323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243587 + ... + 315533.

Almost surely, 2^20113503320 is an apocalyptic number.

20113503320 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 20113503320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23505411600).

20113503320 is an abundant number, since it is smaller than the sum of its proper divisors (26897319880).

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

20113503320 is a wasteful number, since it uses less digits than its factorization.

20113503320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72228 (or 72224 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The spelling of 20113503320 in words is "twenty billion, one hundred thirteen million, five hundred three thousand, three hundred twenty".