21325355061450 has 384 divisors, whose sum is σ = 58865016397824. Its totient is φ = 5066258400000.

The previous prime is 21325355061419. The next prime is 21325355061457. The reversal of 21325355061450 is 5416055352312.

It is a super-2 number, since 2×21325355061450² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21325355061457) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6953162817 + ... + 6953165883.

It is an arithmetic number, because the mean of its divisors is an integer number (153294313536).

Almost surely, 2^{21325355061450} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21325355061450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29432508198912).

21325355061450 is an abundant number, since it is smaller than the sum of its proper divisors (37539661336374).

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

21325355061450 is a wasteful number, since it uses less digits than its factorization.

21325355061450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610 (or 3605 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 21325355061450 in words is "twenty-one trillion, three hundred twenty-five billion, three hundred fifty-five million, sixty-one thousand, four hundred fifty".