21416320645450 has 48 divisors (see below), whose sum is σ = 40482653872896. Its totient is φ = 8427630657600.

The previous prime is 21416320645403. The next prime is 21416320645463. The reversal of 21416320645450 is 5454602361412.

It is a junction number, because it is equal to n+sod(n) for n = 21416320645397 and 21416320645406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4871217 + ... + 8158516.

It is an arithmetic number, because the mean of its divisors is an integer number (843388622352).

Almost surely, 2^{21416320645450} is an apocalyptic number.

21416320645450 is a deficient number, since it is larger than the sum of its proper divisors (19066333227446).

21416320645450 is a wasteful number, since it uses less digits than its factorization.

21416320645450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13030279 (or 13030274 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 21416320645450 in words is "twenty-one trillion, four hundred sixteen billion, three hundred twenty million, six hundred forty-five thousand, four hundred fifty".