21652446450 has 192 divisors, whose sum is σ = 56633375232. Its totient is φ = 5468774400.

The previous prime is 21652446437. The next prime is 21652446463. The reversal of 21652446450 is 5464425612.

It is an interprime number because it is at equal distance from previous prime (21652446437) and next prime (21652446463).

It is a junction number, because it is equal to n+sod(n) for n = 21652446399 and 21652446408.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50005434 + ... + 50005866.

It is an arithmetic number, because the mean of its divisors is an integer number (294965496).

Almost surely, 2^21652446450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21652446450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28316687616).

21652446450 is an abundant number, since it is smaller than the sum of its proper divisors (34980928782).

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

21652446450 is a wasteful number, since it uses less digits than its factorization.

21652446450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 21652446450 in words is "twenty-one billion, six hundred fifty-two million, four hundred forty-six thousand, four hundred fifty".