21115323264260 has 24 divisors (see below), whose sum is σ = 44949605965656. Its totient is φ = 8330428903680.

The previous prime is 21115323264229. The next prime is 21115323264281. The reversal of 21115323264260 is 6246232351112.

It can be written as a sum of positive squares in 4 ways, for example, as 1420349102656 + 19694974161604 = 1191784^2 + 4437902^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7231273631 + ... + 7231276550.

It is an arithmetic number, because the mean of its divisors is an integer number (1872900248569).

Almost surely, 2^{21115323264260} is an apocalyptic number.

21115323264260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21115323264260 is an abundant number, since it is smaller than the sum of its proper divisors (23834282701396).

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

21115323264260 is a wasteful number, since it uses less digits than its factorization.

21115323264260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14462550263 (or 14462550261 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 21115323264260 in words is "twenty-one trillion, one hundred fifteen billion, three hundred twenty-three million, two hundred sixty-four thousand, two hundred sixty".