21204154304 has 14 divisors (see below), whose sum is σ = 42076993824. Its totient is φ = 10602077120.

The previous prime is 21204154289. The next prime is 21204154333. The reversal of 21204154304 is 40345140212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165657392 + ... + 165657519.

Almost surely, 2^21204154304 is an apocalyptic number.

It is an amenable number.

21204154304 is a deficient number, since it is larger than the sum of its proper divisors (20872839520).

21204154304 is an equidigital number, since it uses as much as digits as its factorization.

21204154304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331314923 (or 331314913 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 21204154304 its reverse (40345140212), we get a palindrome (61549294516).

The spelling of 21204154304 in words is "twenty-one billion, two hundred four million, one hundred fifty-four thousand, three hundred four".