21045311452320 has 384 divisors, whose sum is σ = 68007831558912. Its totient is φ = 5469315072000.

The previous prime is 21045311452289. The next prime is 21045311452367. The reversal of 21045311452320 is 2325411354012.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 814402600 + ... + 814428440.

It is an arithmetic number, because the mean of its divisors is an integer number (177103728018).

Almost surely, 2^{21045311452320} is an apocalyptic number.

21045311452320 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 21045311452320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34003915779456).

21045311452320 is an abundant number, since it is smaller than the sum of its proper divisors (46962520106592).

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

21045311452320 is a wasteful number, since it uses less digits than its factorization.

21045311452320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26224 (or 26216 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 21045311452320 in words is "twenty-one trillion, forty-five billion, three hundred eleven million, four hundred fifty-two thousand, three hundred twenty".