20110211140 has 48 divisors (see below), whose sum is σ = 43664166000. Its totient is φ = 7774106112.

The previous prime is 20110211123. The next prime is 20110211141. The reversal of 20110211140 is 4111201102.

It can be written as a sum of positive squares in 8 ways, for example, as 1070074944 + 19040136196 = 32712^2 + 137986^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20110211140.

It is not an unprimeable number, because it can be changed into a prime (20110211141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19066 + ... + 201454.

It is an arithmetic number, because the mean of its divisors is an integer number (909670125).

Almost surely, 2^20110211140 is an apocalyptic number.

20110211140 is a gapful number since it is divisible by the number (20) 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 20110211140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21832083000).

20110211140 is an abundant number, since it is smaller than the sum of its proper divisors (23553954860).

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

20110211140 is a wasteful number, since it uses less digits than its factorization.

20110211140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182584 (or 182582 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20110211140 its reverse (4111201102), we get a palindrome (24221412242).

The spelling of 20110211140 in words is "twenty billion, one hundred ten million, two hundred eleven thousand, one hundred forty".