21433301340 has 192 divisors, whose sum is σ = 66912652800. Its totient is φ = 5082485760.

The previous prime is 21433301339. The next prime is 21433301369. The reversal of 21433301340 is 4310333412.

It is a self number, because there is not a number n which added to its sum of digits gives 21433301340.

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 63 ways as a sum of consecutive naturals, for example, 6587154 + ... + 6590406.

It is an arithmetic number, because the mean of its divisors is an integer number (348503400).

Almost surely, 2^21433301340 is an apocalyptic number.

21433301340 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 21433301340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33456326400).

21433301340 is an abundant number, since it is smaller than the sum of its proper divisors (45479351460).

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

21433301340 is a wasteful number, since it uses less digits than its factorization.

21433301340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492 (or 3490 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21433301340 its reverse (4310333412), we get a palindrome (25743634752).

The spelling of 21433301340 in words is "twenty-one billion, four hundred thirty-three million, three hundred one thousand, three hundred forty".