21434030032 has 80 divisors (see below), whose sum is σ = 44735976000. Its totient is φ = 9911937024.

The previous prime is 21434030011. The next prime is 21434030053. The reversal of 21434030032 is 23003043412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21434030011) and next prime (21434030053).

It is a junction number, because it is equal to n+sod(n) for n = 21434029985 and 21434030012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9092598 + ... + 9094954.

It is an arithmetic number, because the mean of its divisors is an integer number (559199700).

Almost surely, 2^21434030032 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 21434030032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22367988000).

21434030032 is an abundant number, since it is smaller than the sum of its proper divisors (23301945968).

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

21434030032 is a wasteful number, since it uses less digits than its factorization.

21434030032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21434030032 its reverse (23003043412), we get a palindrome (44437073444).

The spelling of 21434030032 in words is "twenty-one billion, four hundred thirty-four million, thirty thousand, thirty-two".