20100445500 has 96 divisors (see below), whose sum is σ = 59492317248. Its totient is φ = 5272224000.

The previous prime is 20100445489. The next prime is 20100445511. The reversal of 20100445500 is 554400102.

It is an interprime number because it is at equal distance from previous prime (20100445489) and next prime (20100445511).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18339 + ... + 201338.

It is an arithmetic number, because the mean of its divisors is an integer number (619711638).

Almost surely, 2^20100445500 is an apocalyptic number.

20100445500 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 20100445500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29746158624).

20100445500 is an abundant number, since it is smaller than the sum of its proper divisors (39391871748).

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

20100445500 is a wasteful number, since it uses less digits than its factorization.

20100445500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219760 (or 219748 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20100445500 its reverse (554400102), we get a palindrome (20654845602).

The spelling of 20100445500 in words is "twenty billion, one hundred million, four hundred forty-five thousand, five hundred".