12821023368 has 48 divisors (see below), whose sum is σ = 34834604220. Its totient is φ = 4260013056.

The previous prime is 12821023351. The next prime is 12821023421. The reversal of 12821023368 is 86332012821.

12821023368 is a `hidden beast` number, since 1 + 282 + 10 + 2 + 3 + 368 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12719779524 + 101243844 = 112782^2 + 10062^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261921 + ... + 306992.

Almost surely, 2^12821023368 is an apocalyptic number.

12821023368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12821023368 is an abundant number, since it is smaller than the sum of its proper divisors (22013580852).

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

12821023368 is a wasteful number, since it uses less digits than its factorization.

12821023368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569238 (or 569231 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 12821023368 in words is "twelve billion, eight hundred twenty-one million, twenty-three thousand, three hundred sixty-eight".