21115323152036 has 12 divisors (see below), whose sum is σ = 36951867341340. Its totient is φ = 10557646768800.

The previous prime is 21115323152029. The next prime is 21115323152057. The reversal of 21115323152036 is 63025132351112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17596397377636 + 3518925774400 = 4194806^2 + 1875880^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21115323151987 and 21115323152005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104951 + ... + 6499358.

It is an arithmetic number, because the mean of its divisors is an integer number (3079322278445).

Almost surely, 2^{21115323152036} is an apocalyptic number.

It is an amenable number.

21115323152036 is a deficient number, since it is larger than the sum of its proper divisors (15836544189304).

21115323152036 is a wasteful number, since it uses less digits than its factorization.

21115323152036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403614 (or 7403612 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 21115323152036 in words is "twenty-one trillion, one hundred fifteen billion, three hundred twenty-three million, one hundred fifty-two thousand, thirty-six".