21013040214 has 48 divisors (see below), whose sum is σ = 46570680000. Its totient is φ = 6844446720.

The previous prime is 21013040207. The next prime is 21013040287. The reversal of 21013040214 is 41204031012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 522912 + ... + 561660.

It is an arithmetic number, because the mean of its divisors is an integer number (970222500).

Almost surely, 2^21013040214 is an apocalyptic number.

21013040214 is an abundant number, since it is smaller than the sum of its proper divisors (25557639786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21013040214 is a wasteful number, since it uses less digits than its factorization.

21013040214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39445 (or 39442 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21013040214 its reverse (41204031012), we get a palindrome (62217071226).

The spelling of 21013040214 in words is "twenty-one billion, thirteen million, forty thousand, two hundred fourteen".