21633380343 has 16 divisors (see below), whose sum is σ = 32831148000. Its totient is φ = 14070490560.

The previous prime is 21633380341. The next prime is 21633380347. The reversal of 21633380343 is 34308333612.

21633380343 is a `hidden beast` number, since 216 + 33 + 380 + 34 + 3 = 666.

It is not a de Polignac number, because 21633380343 - 2¹ = 21633380341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21633380298 and 21633380307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21633380341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9770068 + ... + 9772281.

It is an arithmetic number, because the mean of its divisors is an integer number (2051946750).

Almost surely, 2^21633380343 is an apocalyptic number.

21633380343 is a deficient number, since it is larger than the sum of its proper divisors (11197767657).

21633380343 is a wasteful number, since it uses less digits than its factorization.

21633380343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19542399 (or 19542393 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The spelling of 21633380343 in words is "twenty-one billion, six hundred thirty-three million, three hundred eighty thousand, three hundred forty-three".