20600100 has 108 divisors (see below), whose sum is σ = 66079104. Its totient is φ = 5365440.

The previous prime is 20600087. The next prime is 20600101. The reversal of 20600100 is 100602.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20600101) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 42057 + ... + 42543.

Almost surely, 2^20600100 is an apocalyptic number.

20600100 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 20600100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33039552).

20600100 is an abundant number, since it is smaller than the sum of its proper divisors (45479004).

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

20600100 is a wasteful number, since it uses less digits than its factorization.

20600100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20600100 is about 4538.7333034669. The cubic root of 20600100 is about 274.1299222238.

Adding to 20600100 its reverse (100602), we get a palindrome (20700702).

The spelling of 20600100 in words is "twenty million, six hundred thousand, one hundred".