100550000020 has 48 divisors (see below), whose sum is σ = 219827719440. Its totient is φ = 38585723904.

The previous prime is 100549999987. The next prime is 100550000021. The reversal of 100550000020 is 20000055001.

It can be written as a sum of positive squares in 8 ways, for example, as 10095828484 + 90454171536 = 100478^2 + 300756^2 .

It is a super-2 number, since 2×100550000020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100550000021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461049 + ... + 643168.

It is an arithmetic number, because the mean of its divisors is an integer number (4579744155).

Almost surely, 2^100550000020 is an apocalyptic number.

100550000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100550000020 is an abundant number, since it is smaller than the sum of its proper divisors (119277719420).

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

100550000020 is a wasteful number, since it uses less digits than its factorization.

100550000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104412 (or 1104410 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

Adding to 100550000020 its reverse (20000055001), we get a palindrome (120550055021).

The spelling of 100550000020 in words is "one hundred billion, five hundred fifty million, twenty", and thus it is an aban number.