11243400020 has 24 divisors (see below), whose sum is σ = 23663745000. Its totient is φ = 4487340032.

The previous prime is 11243399953. The next prime is 11243400023. The reversal of 11243400020 is 2000434211.

It can be written as a sum of positive squares in 4 ways, for example, as 431143696 + 10812256324 = 20764^2 + 103982^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11243400023) 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, 617045 + ... + 635004.

It is an arithmetic number, because the mean of its divisors is an integer number (985989375).

Almost surely, 2^11243400020 is an apocalyptic number.

11243400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11243400020 is an abundant number, since it is smaller than the sum of its proper divisors (12420344980).

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

11243400020 is a wasteful number, since it uses less digits than its factorization.

11243400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252507 (or 1252505 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 11243400020 its reverse (2000434211), we get a palindrome (13243834231).

The spelling of 11243400020 in words is "eleven billion, two hundred forty-three million, four hundred thousand, twenty".