21340321750 has 32 divisors (see below), whose sum is σ = 43580822688. Its totient is φ = 7760116000.

The previous prime is 21340321741. The next prime is 21340321829. The reversal of 21340321750 is 5712304312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3877309 + ... + 3882808.

It is an arithmetic number, because the mean of its divisors is an integer number (1361900709).

Almost surely, 2^21340321750 is an apocalyptic number.

21340321750 is an abundant number, since it is smaller than the sum of its proper divisors (22240500938).

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

21340321750 is a wasteful number, since it uses less digits than its factorization.

21340321750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7760145 (or 7760135 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 21340321750 in words is "twenty-one billion, three hundred forty million, three hundred twenty-one thousand, seven hundred fifty".