915111020020 has 12 divisors (see below), whose sum is σ = 1921733142084. Its totient is φ = 366044408000.

The previous prime is 915111019987. The next prime is 915111020039. The reversal of 915111020020 is 20020111519.

It can be written as a sum of positive squares in 2 ways, for example, as 720661770724 + 194449249296 = 848918^2 + 440964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 915111019973 and 915111020000.

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, 22877775481 + ... + 22877775520.

It is an arithmetic number, because the mean of its divisors is an integer number (160144428507).

Almost surely, 2^915111020020 is an apocalyptic number.

It is an amenable number.

915111020020 is an abundant number, since it is smaller than the sum of its proper divisors (1006622122064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

915111020020 is a wasteful number, since it uses less digits than its factorization.

915111020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45755551010 (or 45755551008 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 22.

Adding to 915111020020 its reverse (20020111519), we get a palindrome (935131131539).

The spelling of 915111020020 in words is "nine hundred fifteen billion, one hundred eleven million, twenty thousand, twenty".