21333301040 has 80 divisors (see below), whose sum is σ = 50836487328. Its totient is φ = 8321230848.

The previous prime is 21333300983. The next prime is 21333301043. The reversal of 21333301040 is 4010333312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21333301043) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2241572 + ... + 2251068.

Almost surely, 2^21333301040 is an apocalyptic number.

21333301040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21333301040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25418243664).

21333301040 is an abundant number, since it is smaller than the sum of its proper divisors (29503186288).

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

21333301040 is a wasteful number, since it uses less digits than its factorization.

21333301040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206 (or 10200 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21333301040 its reverse (4010333312), we get a palindrome (25343634352).

The spelling of 21333301040 in words is "twenty-one billion, three hundred thirty-three million, three hundred one thousand, forty".