21433018861 has 8 divisors (see below), whose sum is σ = 21632643648. Its totient is φ = 21233940000.

The previous prime is 21433018811. The next prime is 21433018891. The reversal of 21433018861 is 16881033412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21433018861 is a prime.

It is a super-3 number, since 3×21433018861³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21433018861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433018811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57385 + ... + 214846.

It is an arithmetic number, because the mean of its divisors is an integer number (2704080456).

Almost surely, 2^21433018861 is an apocalyptic number.

It is an amenable number.

21433018861 is a deficient number, since it is larger than the sum of its proper divisors (199624787).

21433018861 is a wasteful number, since it uses less digits than its factorization.

21433018861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272963.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 21433018861 in words is "twenty-one billion, four hundred thirty-three million, eighteen thousand, eight hundred sixty-one".