11431223420 has 24 divisors (see below), whose sum is σ = 24035203248. Its totient is φ = 4566844800.

The previous prime is 11431223413. The next prime is 11431223459. The reversal of 11431223420 is 2432213411.

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, 336161 + ... + 368600.

It is an arithmetic number, because the mean of its divisors is an integer number (1001466802).

Almost surely, 2^11431223420 is an apocalyptic number.

11431223420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11431223420 is an abundant number, since it is smaller than the sum of its proper divisors (12603979828).

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

11431223420 is a wasteful number, since it uses less digits than its factorization.

11431223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705581 (or 705579 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 11431223420 its reverse (2432213411), we get a palindrome (13863436831).

The spelling of 11431223420 in words is "eleven billion, four hundred thirty-one million, two hundred twenty-three thousand, four hundred twenty".