21022002340 has 24 divisors (see below), whose sum is σ = 44767985472. Its totient is φ = 8290366560.

The previous prime is 21022002319. The next prime is 21022002377. The reversal of 21022002340 is 4320022012.

It is an unprimeable number.

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, 7400694 + ... + 7403533.

It is an arithmetic number, because the mean of its divisors is an integer number (1865332728).

Almost surely, 2^21022002340 is an apocalyptic number.

21022002340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022002340 is an abundant number, since it is smaller than the sum of its proper divisors (23745983132).

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

21022002340 is a wasteful number, since it uses less digits than its factorization.

21022002340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804307 (or 14804305 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21022002340 its reverse (4320022012), we get a palindrome (25342024352).

The spelling of 21022002340 in words is "twenty-one billion, twenty-two million, two thousand, three hundred forty".