20111430432 has 24 divisors (see below), whose sum is σ = 52792505136. Its totient is φ = 6703810112.

The previous prime is 20111430397. The next prime is 20111430461. The reversal of 20111430432 is 23403411102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 20111430399 and 20111430408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104746938 + ... + 104747129.

It is an arithmetic number, because the mean of its divisors is an integer number (2199687714).

Almost surely, 2^20111430432 is an apocalyptic number.

It is an amenable number.

20111430432 is an abundant number, since it is smaller than the sum of its proper divisors (32681074704).

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

20111430432 is a wasteful number, since it uses less digits than its factorization.

20111430432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209494080 (or 209494072 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20111430432 its reverse (23403411102), we get a palindrome (43514841534).

The spelling of 20111430432 in words is "twenty billion, one hundred eleven million, four hundred thirty thousand, four hundred thirty-two".