21002404110 has 64 divisors (see below), whose sum is σ = 53605843200. Its totient is φ = 5251156992.

The previous prime is 21002403941. The next prime is 21002404151. The reversal of 21002404110 is 1140420012.

It is a super-2 number, since 2×21002404110² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21002404110.

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 31 ways as a sum of consecutive naturals, for example, 134640 + ... + 245219.

It is an arithmetic number, because the mean of its divisors is an integer number (837591300).

Almost surely, 2^21002404110 is an apocalyptic number.

21002404110 is an abundant number, since it is smaller than the sum of its proper divisors (32603439090).

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

21002404110 is a wasteful number, since it uses less digits than its factorization.

21002404110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379985.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21002404110 its reverse (1140420012), we get a palindrome (22142824122).

The spelling of 21002404110 in words is "twenty-one billion, two million, four hundred four thousand, one hundred ten".