21040011304 has 32 divisors (see below), whose sum is σ = 44720676000. Its totient is φ = 9199680192.

The previous prime is 21040011281. The next prime is 21040011313. The reversal of 21040011304 is 40311004012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5321914 + ... + 5325865.

It is an arithmetic number, because the mean of its divisors is an integer number (1397521125).

Almost surely, 2^21040011304 is an apocalyptic number.

It is an amenable number.

21040011304 is an abundant number, since it is smaller than the sum of its proper divisors (23680664696).

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

21040011304 is a wasteful number, since it uses less digits than its factorization.

21040011304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647817 (or 10647813 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21040011304 its reverse (40311004012), we get a palindrome (61351015316).

The spelling of 21040011304 in words is "twenty-one billion, forty million, eleven thousand, three hundred four".