21343203308 has 12 divisors (see below), whose sum is σ = 42686406672. Its totient is φ = 9147087120.

The previous prime is 21343203307. The next prime is 21343203311. The reversal of 21343203308 is 80330234312.

21343203308 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21343203307) 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, 381128603 + ... + 381128658.

It is an arithmetic number, because the mean of its divisors is an integer number (3557200556).

Almost surely, 2^21343203308 is an apocalyptic number.

21343203308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21343203308 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21343203308 is a wasteful number, since it uses less digits than its factorization.

21343203308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762257272 (or 762257270 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The spelling of 21343203308 in words is "twenty-one billion, three hundred forty-three million, two hundred three thousand, three hundred eight".