21333501330 has 64 divisors (see below), whose sum is σ = 52089094656. Its totient is φ = 5590368000.

The previous prime is 21333501323. The next prime is 21333501347. The reversal of 21333501330 is 3310533312.

It is a super-2 number, since 2×21333501330² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21333501330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2156295 + ... + 2166165.

It is an arithmetic number, because the mean of its divisors is an integer number (813892104).

Almost surely, 2^21333501330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21333501330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26044547328).

21333501330 is an abundant number, since it is smaller than the sum of its proper divisors (30755593326).

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

21333501330 is a wasteful number, since it uses less digits than its factorization.

21333501330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11123.

The product of its (nonzero) digits is 2430, while the sum is 24.

The spelling of 21333501330 in words is "twenty-one billion, three hundred thirty-three million, five hundred one thousand, three hundred thirty".