21058218110 has 48 divisors (see below), whose sum is σ = 39693338496. Its totient is φ = 8040719232.

The previous prime is 21058218089. The next prime is 21058218113. The reversal of 21058218110 is 1181285012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21058218113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 711059 + ... + 740081.

It is an arithmetic number, because the mean of its divisors is an integer number (826944552).

Almost surely, 2^21058218110 is an apocalyptic number.

It is a pronic number, being equal to 145114×145115.

21058218110 is a deficient number, since it is larger than the sum of its proper divisors (18635120386).

21058218110 is a wasteful number, since it uses less digits than its factorization.

21058218110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29157 (or 29120 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 29.

The spelling of 21058218110 in words is "twenty-one billion, fifty-eight million, two hundred eighteen thousand, one hundred ten".