21040153330650 has 48 divisors (see below), whose sum is σ = 52180693656384. Its totient is φ = 5610587834880.

The previous prime is 21040153330627. The next prime is 21040153330661. The reversal of 21040153330650 is 5603335104012.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5670762 + ... + 8616138.

It is an arithmetic number, because the mean of its divisors is an integer number (1087097784508).

Almost surely, 2^{21040153330650} is an apocalyptic number.

21040153330650 is an abundant number, since it is smaller than the sum of its proper divisors (31140540325734).

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

21040153330650 is a wasteful number, since it uses less digits than its factorization.

21040153330650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993015 (or 2993010 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 21040153330650 its reverse (5603335104012), we get a palindrome (26643488434662).

The spelling of 21040153330650 in words is "twenty-one trillion, forty billion, one hundred fifty-three million, three hundred thirty thousand, six hundred fifty".