11432311220 has 24 divisors (see below), whose sum is σ = 26190386208. Its totient is φ = 4157204000.

The previous prime is 11432311169. The next prime is 11432311243. The reversal of 11432311220 is 2211323411.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11432311192 and 11432311201.

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, 25982306 + ... + 25982745.

It is an arithmetic number, because the mean of its divisors is an integer number (1091266092).

Almost surely, 2^11432311220 is an apocalyptic number.

11432311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11432311220 is an abundant number, since it is smaller than the sum of its proper divisors (14758074988).

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

11432311220 is a wasteful number, since it uses less digits than its factorization.

11432311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51965071 (or 51965069 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11432311220 its reverse (2211323411), we get a palindrome (13643634631).

The spelling of 11432311220 in words is "eleven billion, four hundred thirty-two million, three hundred eleven thousand, two hundred twenty".