21000000304 has 40 divisors (see below), whose sum is σ = 40840814592. Its totient is φ = 10460504640.

The previous prime is 21000000271. The next prime is 21000000311. The reversal of 21000000304 is 40300000012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7860889 + ... + 7863559.

Almost surely, 2^21000000304 is an apocalyptic number.

It is an amenable number.

21000000304 is a deficient number, since it is larger than the sum of its proper divisors (19840814288).

21000000304 is a wasteful number, since it uses less digits than its factorization.

21000000304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345 (or 4339 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 21000000304 its reverse (40300000012), we get a palindrome (61300000316).

The spelling of 21000000304 in words is "twenty-one billion, three hundred four", and thus it is an aban number.