11107781020 has 48 divisors (see below), whose sum is σ = 27034172928. Its totient is φ = 3754739520.

The previous prime is 11107780993. The next prime is 11107781033. The reversal of 11107781020 is 2018770111.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 11107781020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548802 + ... + 568681.

It is an arithmetic number, because the mean of its divisors is an integer number (563211936).

Almost surely, 2^11107781020 is an apocalyptic number.

11107781020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11107781020 is an abundant number, since it is smaller than the sum of its proper divisors (15926391908).

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

11107781020 is a wasteful number, since it uses less digits than its factorization.

11107781020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117570 (or 1117568 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 28.

The spelling of 11107781020 in words is "eleven billion, one hundred seven million, seven hundred eighty-one thousand, twenty".