20112154144 has 24 divisors (see below), whose sum is σ = 39634273728. Its totient is φ = 10046306880.

The previous prime is 20112154133. The next prime is 20112154159. The reversal of 20112154144 is 44145121102.

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, 271812 + ... + 337795.

It is an arithmetic number, because the mean of its divisors is an integer number (1651428072).

Almost surely, 2^20112154144 is an apocalyptic number.

It is an amenable number.

20112154144 is a deficient number, since it is larger than the sum of its proper divisors (19522119584).

20112154144 is a wasteful number, since it uses less digits than its factorization.

20112154144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610648 (or 610640 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 20112154144 its reverse (44145121102), we get a palindrome (64257275246).

The spelling of 20112154144 in words is "twenty billion, one hundred twelve million, one hundred fifty-four thousand, one hundred forty-four".