21304111304 has 64 divisors (see below), whose sum is σ = 49353244800. Its totient is φ = 8415995904.

The previous prime is 21304111277. The next prime is 21304111313. The reversal of 21304111304 is 40311140312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231209 + ... + 309944.

It is an arithmetic number, because the mean of its divisors is an integer number (771144450).

Almost surely, 2^21304111304 is an apocalyptic number.

It is an amenable number.

21304111304 is an abundant number, since it is smaller than the sum of its proper divisors (28049133496).

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

21304111304 is a wasteful number, since it uses less digits than its factorization.

21304111304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541222 (or 541218 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21304111304 its reverse (40311140312), we get a palindrome (61615251616).

The spelling of 21304111304 in words is "twenty-one billion, three hundred four million, one hundred eleven thousand, three hundred four".