21040304350 has 48 divisors (see below), whose sum is σ = 43042120128. Its totient is φ = 7603424640.

The previous prime is 21040304333. The next prime is 21040304357. The reversal of 21040304350 is 5340304012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21040304357) 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 23 ways as a sum of consecutive naturals, for example, 313809 + ... + 374908.

It is an arithmetic number, because the mean of its divisors is an integer number (896710836).

Almost surely, 2^21040304350 is an apocalyptic number.

21040304350 is an abundant number, since it is smaller than the sum of its proper divisors (22001815778).

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

21040304350 is a wasteful number, since it uses less digits than its factorization.

21040304350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688789 (or 688784 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 21040304350 its reverse (5340304012), we get a palindrome (26380608362).

The spelling of 21040304350 in words is "twenty-one billion, forty million, three hundred four thousand, three hundred fifty".