21003343000 has 32 divisors (see below), whose sum is σ = 49147824960. Its totient is φ = 8401336800.

The previous prime is 21003342847. The next prime is 21003343027. The reversal of 21003343000 is 34330012.

It is a super-2 number, since 2×21003343000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10500672 + ... + 10502671.

It is an arithmetic number, because the mean of its divisors is an integer number (1535869530).

Almost surely, 2^21003343000 is an apocalyptic number.

21003343000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003343000 is an abundant number, since it is smaller than the sum of its proper divisors (28144481960).

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

21003343000 is a wasteful number, since it uses less digits than its factorization.

21003343000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21003364 (or 21003350 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21003343000 its reverse (34330012), we get a palindrome (21037673012).

The spelling of 21003343000 in words is "twenty-one billion, three million, three hundred forty-three thousand".