11143420305 has 32 divisors (see below), whose sum is σ = 18778604544. Its totient is φ = 5631612096.

The previous prime is 11143420291. The next prime is 11143420361. The reversal of 11143420305 is 50302434111.

It is a happy number.

It is not a de Polignac number, because 11143420305 - 2²⁵ = 11109865873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114019 + ... + 187848.

It is an arithmetic number, because the mean of its divisors is an integer number (586831392).

Almost surely, 2^11143420305 is an apocalyptic number.

11143420305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11143420305 is a deficient number, since it is larger than the sum of its proper divisors (7635184239).

11143420305 is a wasteful number, since it uses less digits than its factorization.

11143420305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302005.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 11143420305 its reverse (50302434111), we get a palindrome (61445854416).

The spelling of 11143420305 in words is "eleven billion, one hundred forty-three million, four hundred twenty thousand, three hundred five".