21214442004000 has 576 divisors, whose sum is σ = 81057152397312. Its totient is φ = 4836303360000.

The previous prime is 21214442003959. The next prime is 21214442004001. The reversal of 21214442004000 is 40024441212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21214442004001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 225156900 + ... + 225251100.

It is an arithmetic number, because the mean of its divisors is an integer number (140724222912).

Almost surely, 2^{21214442004000} is an apocalyptic number.

21214442004000 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 21214442004000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40528576198656).

21214442004000 is an abundant number, since it is smaller than the sum of its proper divisors (59842710393312).

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

21214442004000 is a wasteful number, since it uses less digits than its factorization.

21214442004000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94626 (or 94601 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21214442004000 its reverse (40024441212), we get a palindrome (21254466445212).

The spelling of 21214442004000 in words is "twenty-one trillion, two hundred fourteen billion, four hundred forty-two million, four thousand".