21004144423300 has 36 divisors (see below), whose sum is σ = 45851921539200. Its totient is φ = 8351348434720.

The previous prime is 21004144423277. The next prime is 21004144423343. The reversal of 21004144423300 is 332444140012.

It is a super-5 number, since 5×21004144423300⁵ (a number of 68 digits) contains 55555 as substring.

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 11 ways as a sum of consecutive naturals, for example, 628849900 + ... + 628883299.

It is an arithmetic number, because the mean of its divisors is an integer number (1273664487200).

Almost surely, 2^{21004144423300} is an apocalyptic number.

21004144423300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21004144423300 is an abundant number, since it is smaller than the sum of its proper divisors (24847777115900).

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

21004144423300 is a wasteful number, since it uses less digits than its factorization.

21004144423300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257733380 (or 1257733373 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21004144423300 its reverse (332444140012), we get a palindrome (21336588563312).

The spelling of 21004144423300 in words is "twenty-one trillion, four billion, one hundred forty-four million, four hundred twenty-three thousand, three hundred".