21350012304 has 20 divisors (see below), whose sum is σ = 55154198576. Its totient is φ = 7116670752.

The previous prime is 21350012293. The next prime is 21350012317. The reversal of 21350012304 is 40321005312.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 222395914 + ... + 222396009.

Almost surely, 2^21350012304 is an apocalyptic number.

21350012304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21350012304 is an abundant number, since it is smaller than the sum of its proper divisors (33804186272).

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

21350012304 is a wasteful number, since it uses less digits than its factorization.

21350012304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444791934 (or 444791928 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21350012304 its reverse (40321005312), we get a palindrome (61671017616).

The spelling of 21350012304 in words is "twenty-one billion, three hundred fifty million, twelve thousand, three hundred four".