21034234524320 has 288 divisors, whose sum is σ = 52401746819520. Its totient is φ = 7977863168000.

The previous prime is 21034234524319. The next prime is 21034234524361. The reversal of 21034234524320 is 2342543243012.

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, 5257242320 + ... + 5257246320.

It is an arithmetic number, because the mean of its divisors is an integer number (181950509790).

Almost surely, 2^{21034234524320} is an apocalyptic number.

21034234524320 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 21034234524320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26200873409760).

21034234524320 is an abundant number, since it is smaller than the sum of its proper divisors (31367512295200).

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

21034234524320 is a wasteful number, since it uses less digits than its factorization.

21034234524320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588 (or 4557 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 21034234524320 its reverse (2342543243012), we get a palindrome (23376777767332).

The spelling of 21034234524320 in words is "twenty-one trillion, thirty-four billion, two hundred thirty-four million, five hundred twenty-four thousand, three hundred twenty".