21068516470 has 16 divisors (see below), whose sum is σ = 38212823088. Its totient is φ = 8363074720.

The previous prime is 21068516437. The next prime is 21068516477. The reversal of 21068516470 is 7461586012.

It is a super-2 number, since 2×21068516470² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21068516477) 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, 8040109 + ... + 8042728.

It is an arithmetic number, because the mean of its divisors is an integer number (2388301443).

Almost surely, 2^21068516470 is an apocalyptic number.

21068516470 is a deficient number, since it is larger than the sum of its proper divisors (17144306618).

21068516470 is a wasteful number, since it uses less digits than its factorization.

21068516470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16082975.

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

The spelling of 21068516470 in words is "twenty-one billion, sixty-eight million, five hundred sixteen thousand, four hundred seventy".