11100020 has 24 divisors (see below), whose sum is σ = 23853984. Its totient is φ = 4336416.

The previous prime is 11100017. The next prime is 11100029. The reversal of 11100020 is 2000111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 11099977 and 11100013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5594 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (993916).

Almost surely, 2^11100020 is an apocalyptic number.

11100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100020 is an abundant number, since it is smaller than the sum of its proper divisors (12753964).

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

11100020 is a wasteful number, since it uses less digits than its factorization.

11100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12959 (or 12957 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 11100020 is about 3331.6692512913. The cubic root of 11100020 is about 223.0700444234.

Adding to 11100020 its reverse (2000111), we get a palindrome (13100131).

Subtracting from 11100020 its reverse (2000111), we obtain a palindrome (9099909).

The spelling of 11100020 in words is "eleven million, one hundred thousand, twenty".