20113111332 has 72 divisors (see below), whose sum is σ = 53875661112. Its totient is φ = 6304896000.

The previous prime is 20113111303. The next prime is 20113111393. The reversal of 20113111332 is 23311131102.

20113111332 is a `hidden beast` number, since 20 + 1 + 1 + 311 + 1 + 332 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 35354916 + 20077756416 = 5946^2 + 141696^2 .

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 23 ways as a sum of consecutive naturals, for example, 783582 + ... + 808842.

It is an arithmetic number, because the mean of its divisors is an integer number (748273071).

Almost surely, 2^20113111332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20113111332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26937830556).

20113111332 is an abundant number, since it is smaller than the sum of its proper divisors (33762549780).

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

20113111332 is a wasteful number, since it uses less digits than its factorization.

20113111332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26589 (or 26584 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20113111332 its reverse (23311131102), we get a palindrome (43424242434).

The spelling of 20113111332 in words is "twenty billion, one hundred thirteen million, one hundred eleven thousand, three hundred thirty-two".