20535116144 has 20 divisors (see below), whose sum is σ = 40461141720. Its totient is φ = 10093531200.

The previous prime is 20535116117. The next prime is 20535116171. The reversal of 20535116144 is 44161153502.

It is an interprime number because it is at equal distance from previous prime (20535116117) and next prime (20535116171).

It is a self number, because there is not a number n which added to its sum of digits gives 20535116144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10875707 + ... + 10877594.

It is an arithmetic number, because the mean of its divisors is an integer number (2023057086).

Almost surely, 2^20535116144 is an apocalyptic number.

It is an amenable number.

20535116144 is a deficient number, since it is larger than the sum of its proper divisors (19926025576).

20535116144 is a wasteful number, since it uses less digits than its factorization.

20535116144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21753368 (or 21753362 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 20535116144 its reverse (44161153502), we get a palindrome (64696269646).

The spelling of 20535116144 in words is "twenty billion, five hundred thirty-five million, one hundred sixteen thousand, one hundred forty-four".