21324127600 has 120 divisors (see below), whose sum is σ = 52254905472. Its totient is φ = 8360851200.

The previous prime is 21324127567. The next prime is 21324127607. The reversal of 21324127600 is 672142312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324127607) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4346749 + ... + 4351651.

Almost surely, 2^21324127600 is an apocalyptic number.

21324127600 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 21324127600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26127452736).

21324127600 is an abundant number, since it is smaller than the sum of its proper divisors (30930777872).

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

21324127600 is a wasteful number, since it uses less digits than its factorization.

21324127600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5135 (or 5124 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 21324127600 its reverse (672142312), we get a palindrome (21996269912).

The spelling of 21324127600 in words is "twenty-one billion, three hundred twenty-four million, one hundred twenty-seven thousand, six hundred".