21046333650 has 96 divisors (see below), whose sum is σ = 52638380928. Its totient is φ = 5564851200.

The previous prime is 21046333613. The next prime is 21046333697. The reversal of 21046333650 is 5633364012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13551274 + ... + 13552826.

It is an arithmetic number, because the mean of its divisors is an integer number (548316468).

Almost surely, 2^21046333650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21046333650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26319190464).

21046333650 is an abundant number, since it is smaller than the sum of its proper divisors (31592047278).

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

21046333650 is a wasteful number, since it uses less digits than its factorization.

21046333650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 21046333650 its reverse (5633364012), we get a palindrome (26679697662).

It can be divided in two parts, 210463336 and 50, that added together give a triangular number (210463386 = T₂₀₅₁₆).

The spelling of 21046333650 in words is "twenty-one billion, forty-six million, three hundred thirty-three thousand, six hundred fifty".