21350322340 has 24 divisors (see below), whose sum is σ = 44839400760. Its totient is φ = 8539419648.

The previous prime is 21350322307. The next prime is 21350322341. The reversal of 21350322340 is 4322305312.

It can be written as a sum of positive squares in 4 ways, for example, as 20304036 + 21330018304 = 4506^2 + 146048^2 .

It is not an unprimeable number, because it can be changed into a prime (21350322341) 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 7 ways as a sum of consecutive naturals, for example, 250234 + ... + 324526.

It is an arithmetic number, because the mean of its divisors is an integer number (1868308365).

Almost surely, 2^21350322340 is an apocalyptic number.

21350322340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21350322340 is an abundant number, since it is smaller than the sum of its proper divisors (23489078420).

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

21350322340 is a wasteful number, since it uses less digits than its factorization.

21350322340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88671 (or 88669 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21350322340 its reverse (4322305312), we get a palindrome (25672627652).

The spelling of 21350322340 in words is "twenty-one billion, three hundred fifty million, three hundred twenty-two thousand, three hundred forty".