11183278420 has 12 divisors (see below), whose sum is σ = 23484884724. Its totient is φ = 4473311360.

The previous prime is 11183278361. The next prime is 11183278441. The reversal of 11183278420 is 2487238111.

It can be written as a sum of positive squares in 2 ways, for example, as 4744178884 + 6439099536 = 68878^2 + 80244^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11183278420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279581941 + ... + 279581980.

It is an arithmetic number, because the mean of its divisors is an integer number (1957073727).

Almost surely, 2^11183278420 is an apocalyptic number.

11183278420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11183278420 is an abundant number, since it is smaller than the sum of its proper divisors (12301606304).

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

11183278420 is a wasteful number, since it uses less digits than its factorization.

11183278420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559163930 (or 559163928 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 11183278420 in words is "eleven billion, one hundred eighty-three million, two hundred seventy-eight thousand, four hundred twenty".