20501052116 has 12 divisors (see below), whose sum is σ = 37436704032. Its totient is φ = 9804850968.

The previous prime is 20501052083. The next prime is 20501052119. The reversal of 20501052116 is 61125010502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 20501052091 and 20501052100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20501052119) by changing a digit.

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, 111418670 + ... + 111418853.

It is an arithmetic number, because the mean of its divisors is an integer number (3119725336).

Almost surely, 2^20501052116 is an apocalyptic number.

It is an amenable number.

20501052116 is a deficient number, since it is larger than the sum of its proper divisors (16935651916).

20501052116 is a wasteful number, since it uses less digits than its factorization.

20501052116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222837550 (or 222837548 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 20501052116 its reverse (61125010502), we get a palindrome (81626062618).

The spelling of 20501052116 in words is "twenty billion, five hundred one million, fifty-two thousand, one hundred sixteen".