20111120440 has 16 divisors (see below), whose sum is σ = 45250021080. Its totient is φ = 8044448160.

The previous prime is 20111120431. The next prime is 20111120461. The reversal of 20111120440 is 4402111102.

It is a happy number.

It is a congruent number.

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, 251388966 + ... + 251389045.

Almost surely, 2^20111120440 is an apocalyptic number.

20111120440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111120440 is an abundant number, since it is smaller than the sum of its proper divisors (25138900640).

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

20111120440 is a wasteful number, since it uses less digits than its factorization.

20111120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502778022 (or 502778018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20111120440 its reverse (4402111102), we get a palindrome (24513231542).

The spelling of 20111120440 in words is "twenty billion, one hundred eleven million, one hundred twenty thousand, four hundred forty".