20111440231144 has 32 divisors (see below), whose sum is σ = 37768459135680. Its totient is φ = 10039852142464.

The previous prime is 20111440231061. The next prime is 20111440231163. The reversal of 20111440231144 is 44113204411102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276915924 + ... + 276988540.

It is an arithmetic number, because the mean of its divisors is an integer number (1180264347990).

Almost surely, 2^{20111440231144} is an apocalyptic number.

It is an amenable number.

20111440231144 is a deficient number, since it is larger than the sum of its proper divisors (17657018904536).

20111440231144 is a wasteful number, since it uses less digits than its factorization.

20111440231144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126777 (or 126773 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 20111440231144 its reverse (44113204411102), we get a palindrome (64224644642246).

The spelling of 20111440231144 in words is "twenty trillion, one hundred eleven billion, four hundred forty million, two hundred thirty-one thousand, one hundred forty-four".