21233022240 has 96 divisors (see below), whose sum is σ = 69792057216. Its totient is φ = 5415956480.

The previous prime is 21233022229. The next prime is 21233022259. The reversal of 21233022240 is 4222033212.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950601 + ... + 972680.

It is an arithmetic number, because the mean of its divisors is an integer number (727000596).

Almost surely, 2^21233022240 is an apocalyptic number.

21233022240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233022240 is an abundant number, since it is smaller than the sum of its proper divisors (48559034976).

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

21233022240 is a wasteful number, since it uses less digits than its factorization.

21233022240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923322 (or 1923314 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21233022240 its reverse (4222033212), we get a palindrome (25455055452).

The spelling of 21233022240 in words is "twenty-one billion, two hundred thirty-three million, twenty-two thousand, two hundred forty".