21730068814 has 16 divisors (see below), whose sum is σ = 34928279568. Its totient is φ = 10102709632.

The previous prime is 21730068779. The next prime is 21730068859. The reversal of 21730068814 is 41886003712.

It is a super-2 number, since 2×21730068814² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 3847297 + ... + 3852940.

It is an arithmetic number, because the mean of its divisors is an integer number (2183017473).

Almost surely, 2^21730068814 is an apocalyptic number.

21730068814 is a deficient number, since it is larger than the sum of its proper divisors (13198210754).

21730068814 is a wasteful number, since it uses less digits than its factorization.

21730068814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7700339.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 21730068814 in words is "twenty-one billion, seven hundred thirty million, sixty-eight thousand, eight hundred fourteen".