1105100020 has 12 divisors (see below), whose sum is σ = 2320710084. Its totient is φ = 442040000.

The previous prime is 1105099991. The next prime is 1105100027. The reversal of 1105100020 is 200015011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 528908004 + 576192016 = 22998^2 + 24004^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105100027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27627481 + ... + 27627520.

It is an arithmetic number, because the mean of its divisors is an integer number (193392507).

Almost surely, 2^1105100020 is an apocalyptic number.

1105100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1105100020 is an abundant number, since it is smaller than the sum of its proper divisors (1215610064).

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

1105100020 is a wasteful number, since it uses less digits than its factorization.

1105100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255010 (or 55255008 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 1105100020 is about 33243.0446860693. The cubic root of 1105100020 is about 1033.8730044925.

Adding to 1105100020 its reverse (200015011), we get a palindrome (1305115031).

The spelling of 1105100020 in words is "one billion, one hundred five million, one hundred thousand, twenty".