11018869820 has 24 divisors (see below), whose sum is σ = 26445287904. Its totient is φ = 3777898176.

The previous prime is 11018869811. The next prime is 11018869853. The reversal of 11018869820 is 2896881011.

It is a super-2 number, since 2×11018869820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39352967 + ... + 39353246.

It is an arithmetic number, because the mean of its divisors is an integer number (1101886996).

Almost surely, 2^11018869820 is an apocalyptic number.

11018869820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11018869820 is an abundant number, since it is smaller than the sum of its proper divisors (15426418084).

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

11018869820 is a wasteful number, since it uses less digits than its factorization.

11018869820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78706229 (or 78706227 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 44.

The spelling of 11018869820 in words is "eleven billion, eighteen million, eight hundred sixty-nine thousand, eight hundred twenty".