21214444000 has 96 divisors (see below), whose sum is σ = 52640969472. Its totient is φ = 8401600000.

The previous prime is 21214443959. The next prime is 21214444049. The reversal of 21214444000 is 44441212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377745 + ... + 430255.

It is an arithmetic number, because the mean of its divisors is an integer number (548343432).

Almost surely, 2^21214444000 is an apocalyptic number.

21214444000 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 21214444000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26320484736).

21214444000 is an abundant number, since it is smaller than the sum of its proper divisors (31426525472).

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

21214444000 is a wasteful number, since it uses less digits than its factorization.

21214444000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52637 (or 52619 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21214444000 its reverse (44441212), we get a palindrome (21258885212).

The spelling of 21214444000 in words is "twenty-one billion, two hundred fourteen million, four hundred forty-four thousand".