21816010210 has 32 divisors (see below), whose sum is σ = 41082515712. Its totient is φ = 8332417920.

The previous prime is 21816010193. The next prime is 21816010211. The reversal of 21816010210 is 1201061812.

It is not an unprimeable number, because it can be changed into a prime (21816010211) 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, 546792 + ... + 585331.

It is an arithmetic number, because the mean of its divisors is an integer number (1283828616).

Almost surely, 2^21816010210 is an apocalyptic number.

21816010210 is a deficient number, since it is larger than the sum of its proper divisors (19266505502).

21816010210 is a wasteful number, since it uses less digits than its factorization.

21816010210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132218.

The product of its (nonzero) digits is 192, while the sum is 22.

The spelling of 21816010210 in words is "twenty-one billion, eight hundred sixteen million, ten thousand, two hundred ten".