11143420452 has 60 divisors (see below), whose sum is σ = 29234279536. Its totient is φ = 3701317680.

The previous prime is 11143420451. The next prime is 11143420471. The reversal of 11143420452 is 25402434111.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11143420451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30927 + ... + 152457.

Almost surely, 2^11143420452 is an apocalyptic number.

11143420452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11143420452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14617139768).

11143420452 is an abundant number, since it is smaller than the sum of its proper divisors (18090859084).

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

11143420452 is a wasteful number, since it uses less digits than its factorization.

11143420452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121830 (or 121819 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 11143420452 its reverse (25402434111), we get a palindrome (36545854563).

The spelling of 11143420452 in words is "eleven billion, one hundred forty-three million, four hundred twenty thousand, four hundred fifty-two".