20131522144 has 24 divisors (see below), whose sum is σ = 39638130840. Its totient is φ = 10064695296.

The previous prime is 20131522069. The next prime is 20131522193. The reversal of 20131522144 is 44122513102.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 336967 + ... + 392185.

It is an arithmetic number, because the mean of its divisors is an integer number (1651588785).

Almost surely, 2^20131522144 is an apocalyptic number.

It is an amenable number.

20131522144 is a deficient number, since it is larger than the sum of its proper divisors (19506608696).

20131522144 is a wasteful number, since it uses less digits than its factorization.

20131522144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66622 (or 66614 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 20131522144 in words is "twenty billion, one hundred thirty-one million, five hundred twenty-two thousand, one hundred forty-four".