20111402432 has 56 divisors (see below), whose sum is σ = 43609973232. Its totient is φ = 9126144000.

The previous prime is 20111402417. The next prime is 20111402453. The reversal of 20111402432 is 23420411102.

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, 399338 + ... + 446870.

It is an arithmetic number, because the mean of its divisors is an integer number (778749522).

Almost surely, 2^20111402432 is an apocalyptic number.

20111402432 is a gapful number since it is divisible by the number (22) 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 20111402432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21804986616).

20111402432 is an abundant number, since it is smaller than the sum of its proper divisors (23498570800).

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

20111402432 is a wasteful number, since it uses less digits than its factorization.

20111402432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48157 (or 48147 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20111402432 its reverse (23420411102), we get a palindrome (43531813534).

The spelling of 20111402432 in words is "twenty billion, one hundred eleven million, four hundred two thousand, four hundred thirty-two".