21433233240 has 96 divisors (see below), whose sum is σ = 69681474720. Its totient is φ = 5713603584.

The previous prime is 21433233197. The next prime is 21433233257. The reversal of 21433233240 is 4233233412.

21433233240 is a `hidden beast` number, since 2 + 1 + 4 + 332 + 3 + 324 + 0 = 666.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1296064 + ... + 1312496.

It is an arithmetic number, because the mean of its divisors is an integer number (725848695).

Almost surely, 2^21433233240 is an apocalyptic number.

21433233240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21433233240 is an abundant number, since it is smaller than the sum of its proper divisors (48248241480).

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

21433233240 is a wasteful number, since it uses less digits than its factorization.

21433233240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20073 (or 20066 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21433233240 its reverse (4233233412), we get a palindrome (25666466652).

The spelling of 21433233240 in words is "twenty-one billion, four hundred thirty-three million, two hundred thirty-three thousand, two hundred forty".