21234441300 has 72 divisors (see below), whose sum is σ = 61454254176. Its totient is φ = 5661048960.

The previous prime is 21234441299. The next prime is 21234441301. The reversal of 21234441300 is 314443212.

It is an interprime number because it is at equal distance from previous prime (21234441299) and next prime (21234441301).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234441301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1645674 + ... + 1658526.

It is an arithmetic number, because the mean of its divisors is an integer number (853531308).

Almost surely, 2^21234441300 is an apocalyptic number.

21234441300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21234441300 is an abundant number, since it is smaller than the sum of its proper divisors (40219812876).

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

21234441300 is a wasteful number, since it uses less digits than its factorization.

21234441300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18377 (or 18370 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21234441300 its reverse (314443212), we get a palindrome (21548884512).

The spelling of 21234441300 in words is "twenty-one billion, two hundred thirty-four million, four hundred forty-one thousand, three hundred".