21068345823340 has 12 divisors (see below), whose sum is σ = 44243526229056. Its totient is φ = 8427338329328.

The previous prime is 21068345823337. The next prime is 21068345823341. The reversal of 21068345823340 is 4332854386012.

It is not an unprimeable number, because it can be changed into a prime (21068345823341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526708645564 + ... + 526708645603.

It is an arithmetic number, because the mean of its divisors is an integer number (3686960519088).

Almost surely, 2^{21068345823340} is an apocalyptic number.

21068345823340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21068345823340 is an abundant number, since it is smaller than the sum of its proper divisors (23175180405716).

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

21068345823340 is a wasteful number, since it uses less digits than its factorization.

21068345823340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053417291176 (or 1053417291174 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 21068345823340 in words is "twenty-one trillion, sixty-eight billion, three hundred forty-five million, eight hundred twenty-three thousand, three hundred forty".