20131022144 has 56 divisors (see below), whose sum is σ = 40134722880. Its totient is φ = 10018473984.

The previous prime is 20131022143. The next prime is 20131022161. The reversal of 20131022144 is 44122013102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131022143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20478677 + ... + 20479659.

It is an arithmetic number, because the mean of its divisors is an integer number (716691480).

Almost surely, 2^20131022144 is an apocalyptic number.

It is an amenable number.

20131022144 is a deficient number, since it is larger than the sum of its proper divisors (20003700736).

20131022144 is an equidigital number, since it uses as much as digits as its factorization.

20131022144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2157 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20131022144 its reverse (44122013102), we get a palindrome (64253035246).

The spelling of 20131022144 in words is "twenty billion, one hundred thirty-one million, twenty-two thousand, one hundred forty-four".