21072466911 has 16 divisors (see below), whose sum is σ = 28313134848. Its totient is φ = 13940256000.

The previous prime is 21072466861. The next prime is 21072466913. The reversal of 21072466911 is 11966427012.

It is not a de Polignac number, because 21072466911 - 2¹¹ = 21072464863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21072466911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21072466913) 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 15 ways as a sum of consecutive naturals, for example, 404431 + ... + 453551.

It is an arithmetic number, because the mean of its divisors is an integer number (1769570928).

Almost surely, 2^21072466911 is an apocalyptic number.

21072466911 is a deficient number, since it is larger than the sum of its proper divisors (7240667937).

21072466911 is a wasteful number, since it uses less digits than its factorization.

21072466911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50222.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 21072466911 in words is "twenty-one billion, seventy-two million, four hundred sixty-six thousand, nine hundred eleven".