20860100100 has 360 divisors, whose sum is σ = 78275267840. Its totient is φ = 4706657280.

The previous prime is 20860100071. The next prime is 20860100123. The reversal of 20860100100 is 100106802.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 4476972 + ... + 4481628.

Almost surely, 2^20860100100 is an apocalyptic number.

20860100100 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 20860100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39137633920).

20860100100 is an abundant number, since it is smaller than the sum of its proper divisors (57415167740).

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

20860100100 is a wasteful number, since it uses less digits than its factorization.

20860100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769 (or 4753 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20860100100 its reverse (100106802), we get a palindrome (20960206902).

The spelling of 20860100100 in words is "twenty billion, eight hundred sixty million, one hundred thousand, one hundred".