21600885730 has 16 divisors (see below), whose sum is σ = 38886443064. Its totient is φ = 8639276800.

The previous prime is 21600885701. The next prime is 21600885731. The reversal of 21600885730 is 3758800612.

It can be written as a sum of positive squares in 4 ways, for example, as 21112961809 + 487923921 = 145303^2 + 22089^2 .

It is not an unprimeable number, because it can be changed into a prime (21600885731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47821 + ... + 213280.

Almost surely, 2^21600885730 is an apocalyptic number.

21600885730 is a deficient number, since it is larger than the sum of its proper divisors (17285557334).

21600885730 is a wasteful number, since it uses less digits than its factorization.

21600885730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269381.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 21600885730 in words is "twenty-one billion, six hundred million, eight hundred eighty-five thousand, seven hundred thirty".