21343310240 has 72 divisors (see below), whose sum is σ = 58656011652. Its totient is φ = 7317703680.

The previous prime is 21343310237. The next prime is 21343310243. The reversal of 21343310240 is 4201334312.

It is an interprime number because it is at equal distance from previous prime (21343310237) and next prime (21343310243).

It can be written as a sum of positive squares in 2 ways, for example, as 20399837584 + 943472656 = 142828^2 + 30716^2 .

It is not an unprimeable number, because it can be changed into a prime (21343310243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1353341 + ... + 1369020.

Almost surely, 2^21343310240 is an apocalyptic number.

21343310240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343310240 is an abundant number, since it is smaller than the sum of its proper divisors (37312701412).

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

21343310240 is a wasteful number, since it uses less digits than its factorization.

21343310240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722390 (or 2722375 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21343310240 its reverse (4201334312), we get a palindrome (25544644552).

The spelling of 21343310240 in words is "twenty-one billion, three hundred forty-three million, three hundred ten thousand, two hundred forty".