21865482650 has 96 divisors (see below), whose sum is σ = 46353033216. Its totient is φ = 7601400000.

The previous prime is 21865482649. The next prime is 21865482673. The reversal of 21865482650 is 5628456812.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21865482595 and 21865482604.

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, 1407425 + ... + 1422875.

It is an arithmetic number, because the mean of its divisors is an integer number (482844096).

Almost surely, 2^21865482650 is an apocalyptic number.

21865482650 is an abundant number, since it is smaller than the sum of its proper divisors (24487550566).

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

21865482650 is a wasteful number, since it uses less digits than its factorization.

21865482650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15588 (or 15583 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 21865482650 in words is "twenty-one billion, eight hundred sixty-five million, four hundred eighty-two thousand, six hundred fifty".