21707055250 has 32 divisors (see below), whose sum is σ = 40793843376. Its totient is φ = 8649011200.

The previous prime is 21707055241. The next prime is 21707055257. The reversal of 21707055250 is 5255070712.

It can be written as a sum of positive squares in 8 ways, for example, as 2904886609 + 18802168641 = 53897^2 + 137121^2 .

It is not an unprimeable number, because it can be changed into a prime (21707055257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104677 + ... + 233176.

Almost surely, 2^21707055250 is an apocalyptic number.

21707055250 is a deficient number, since it is larger than the sum of its proper divisors (19086788126).

21707055250 is a wasteful number, since it uses less digits than its factorization.

21707055250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338127 (or 338117 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 34.

The spelling of 21707055250 in words is "twenty-one billion, seven hundred seven million, fifty-five thousand, two hundred fifty".