21231464304 has 80 divisors (see below), whose sum is σ = 55329530112. Its totient is φ = 7015171584.

The previous prime is 21231464299. The next prime is 21231464341. The reversal of 21231464304 is 40346413212.

It is a congruent number.

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, 5410087 + ... + 5414009.

Almost surely, 2^21231464304 is an apocalyptic number.

21231464304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21231464304 is an abundant number, since it is smaller than the sum of its proper divisors (34098065808).

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

21231464304 is a wasteful number, since it uses less digits than its factorization.

21231464304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894 (or 4888 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21231464304 its reverse (40346413212), we get a palindrome (61577877516).

The spelling of 21231464304 in words is "twenty-one billion, two hundred thirty-one million, four hundred sixty-four thousand, three hundred four".