13111011432 has 64 divisors (see below), whose sum is σ = 36524040000. Its totient is φ = 4357789632.

The previous prime is 13111011391. The next prime is 13111011493. The reversal of 13111011432 is 23411011131.

It is a happy number.

13111011432 is a `hidden beast` number, since 131 + 1 + 101 + 1 + 432 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11578 + ... + 162345.

It is an arithmetic number, because the mean of its divisors is an integer number (570688125).

Almost surely, 2^13111011432 is an apocalyptic number.

13111011432 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 13111011432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18262020000).

13111011432 is an abundant number, since it is smaller than the sum of its proper divisors (23413028568).

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

13111011432 is a wasteful number, since it uses less digits than its factorization.

13111011432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174287 (or 174277 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 13111011432 its reverse (23411011131), we get a palindrome (36522022563).

The spelling of 13111011432 in words is "thirteen billion, one hundred eleven million, eleven thousand, four hundred thirty-two".