20113320 has 32 divisors (see below), whose sum is σ = 60340320. Its totient is φ = 5363520.

The previous prime is 20113319. The next prime is 20113337. The reversal of 20113320 is 2331102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20113296 and 20113305.

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 7 ways as a sum of consecutive naturals, for example, 83686 + ... + 83925.

It is an arithmetic number, because the mean of its divisors is an integer number (1885635).

Almost surely, 2^20113320 is an apocalyptic number.

20113320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113320 is an abundant number, since it is smaller than the sum of its proper divisors (40227000).

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

20113320 is a wasteful number, since it uses less digits than its factorization.

20113320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167625 (or 167621 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20113320 is about 4484.7876203896. The cubic root of 20113320 is about 271.9534594535.

Adding to 20113320 its reverse (2331102), we get a palindrome (22444422).

The spelling of 20113320 in words is "twenty million, one hundred thirteen thousand, three hundred twenty".