21430304444200 has 96 divisors (see below), whose sum is σ = 50042300837760. Its totient is φ = 8534864908800.

The previous prime is 21430304444149. The next prime is 21430304444201. The reversal of 21430304444200 is 244440303412.

It is not an unprimeable number, because it can be changed into a prime (21430304444201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69520812 + ... + 69828388.

It is an arithmetic number, because the mean of its divisors is an integer number (521273967060).

Almost surely, 2^{21430304444200} is an apocalyptic number.

21430304444200 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 21430304444200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25021150418880).

21430304444200 is an abundant number, since it is smaller than the sum of its proper divisors (28611996393560).

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

21430304444200 is a wasteful number, since it uses less digits than its factorization.

21430304444200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309107 (or 309098 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 21430304444200 its reverse (244440303412), we get a palindrome (21674744747612).

The spelling of 21430304444200 in words is "twenty-one trillion, four hundred thirty billion, three hundred four million, four hundred forty-four thousand, two hundred".