20113700 has 36 divisors (see below), whose sum is σ = 43911252. Its totient is φ = 7996800.

The previous prime is 20113673. The next prime is 20113721. The reversal of 20113700 is 731102.

It can be written as a sum of positive squares in 6 ways, for example, as 964324 + 19149376 = 982^2 + 4376^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19190 + ... + 20210.

It is an arithmetic number, because the mean of its divisors is an integer number (1219757).

Almost surely, 2^20113700 is an apocalyptic number.

20113700 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 20113700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21955626).

20113700 is an abundant number, since it is smaller than the sum of its proper divisors (23797552).

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

20113700 is a wasteful number, since it uses less digits than its factorization.

20113700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 20113700 is about 4484.8299856293. The cubic root of 20113700 is about 271.9551721107.

Adding to 20113700 its reverse (731102), we get a palindrome (20844802).

The spelling of 20113700 in words is "twenty million, one hundred thirteen thousand, seven hundred".