21430441332 has 144 divisors (see below), whose sum is σ = 57953750400. Its totient is φ = 6653853696.

The previous prime is 21430441289. The next prime is 21430441363. The reversal of 21430441332 is 23314403412.

21430441332 is a `hidden beast` number, since 21 + 4 + 304 + 4 + 1 + 332 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21430441296 and 21430441305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45889363 + ... + 45889829.

It is an arithmetic number, because the mean of its divisors is an integer number (402456600).

Almost surely, 2^21430441332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21430441332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28976875200).

21430441332 is an abundant number, since it is smaller than the sum of its proper divisors (36523309068).

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

21430441332 is a wasteful number, since it uses less digits than its factorization.

21430441332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21430441332 its reverse (23314403412), we get a palindrome (44744844744).

The spelling of 21430441332 in words is "twenty-one billion, four hundred thirty million, four hundred forty-one thousand, three hundred thirty-two".