21326069268 has 72 divisors (see below), whose sum is σ = 61648292160. Its totient is φ = 6089241600.

The previous prime is 21326069251. The next prime is 21326069279. The reversal of 21326069268 is 86296062312.

21326069268 is a `hidden beast` number, since 2 + 1 + 32 + 606 + 9 + 2 + 6 + 8 = 666.

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 23 ways as a sum of consecutive naturals, for example, 377023 + ... + 429881.

It is an arithmetic number, because the mean of its divisors is an integer number (856226280).

Almost surely, 2^21326069268 is an apocalyptic number.

21326069268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21326069268 is an abundant number, since it is smaller than the sum of its proper divisors (40322222892).

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

21326069268 is a wasteful number, since it uses less digits than its factorization.

21326069268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54477 (or 54472 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 21326069268 in words is "twenty-one billion, three hundred twenty-six million, sixty-nine thousand, two hundred sixty-eight".