21393476211 has 16 divisors (see below), whose sum is σ = 28713877920. Its totient is φ = 14167910400.

The previous prime is 21393476201. The next prime is 21393476213. The reversal of 21393476211 is 11267439312.

It is not a de Polignac number, because 21393476211 - 2⁶ = 21393476147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21393476211.

It is not an unprimeable number, because it can be changed into a prime (21393476213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379525 + ... + 432233.

It is an arithmetic number, because the mean of its divisors is an integer number (1794617370).

Almost surely, 2^21393476211 is an apocalyptic number.

21393476211 is a deficient number, since it is larger than the sum of its proper divisors (7320401709).

21393476211 is a wasteful number, since it uses less digits than its factorization.

21393476211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53606.

The product of its digits is 54432, while the sum is 39.

The spelling of 21393476211 in words is "twenty-one billion, three hundred ninety-three million, four hundred seventy-six thousand, two hundred eleven".