20131033551144 has 16 divisors (see below), whose sum is σ = 50327583877920. Its totient is φ = 6710344517040.

The previous prime is 20131033551137. The next prime is 20131033551163. The reversal of 20131033551144 is 44115533013102.

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, 419396532292 + ... + 419396532339.

It is an arithmetic number, because the mean of its divisors is an integer number (3145473992370).

Almost surely, 2^{20131033551144} is an apocalyptic number.

20131033551144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20131033551144 is an abundant number, since it is smaller than the sum of its proper divisors (30196550326776).

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

20131033551144 is a wasteful number, since it uses less digits than its factorization.

20131033551144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838793064640 (or 838793064636 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 20131033551144 its reverse (44115533013102), we get a palindrome (64246566564246).

The spelling of 20131033551144 in words is "twenty trillion, one hundred thirty-one billion, thirty-three million, five hundred fifty-one thousand, one hundred forty-four".