100511020 has 24 divisors (see below), whose sum is σ = 211274784. Its totient is φ = 40166016.

The previous prime is 100511017. The next prime is 100511029. The reversal of 100511020 is 20115001.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 100510988 and 100511006.

It is not an unprimeable number, because it can be changed into a prime (100511029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29232 + ... + 32488.

It is an arithmetic number, because the mean of its divisors is an integer number (8803116).

Almost surely, 2^100511020 is an apocalyptic number.

100511020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100511020 is an abundant number, since it is smaller than the sum of its proper divisors (110763764).

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

100511020 is a wasteful number, since it uses less digits than its factorization.

100511020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4809 (or 4807 counting only the distinct ones).

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

The square root of 100511020 is about 10025.5184404598. The cubic root of 100511020 is about 464.9481886235.

Adding to 100511020 its reverse (20115001), we get a palindrome (120626021).

The spelling of 100511020 in words is "one hundred million, five hundred eleven thousand, twenty".