21442464300 has 72 divisors (see below), whose sum is σ = 62146397376. Its totient is φ = 5708202560.

The previous prime is 21442464289. The next prime is 21442464319. The reversal of 21442464300 is 346424412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115219 + ... + 236981.

It is an arithmetic number, because the mean of its divisors is an integer number (863144408).

Almost surely, 2^21442464300 is an apocalyptic number.

21442464300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21442464300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31073198688).

21442464300 is an abundant number, since it is smaller than the sum of its proper divisors (40703933076).

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

21442464300 is a wasteful number, since it uses less digits than its factorization.

21442464300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122367 (or 122360 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21442464300 its reverse (346424412), we get a palindrome (21788888712).

The spelling of 21442464300 in words is "twenty-one billion, four hundred forty-two million, four hundred sixty-four thousand, three hundred".