21130033543 has 8 divisors (see below), whose sum is σ = 21344996880. Its totient is φ = 20915394240.

The previous prime is 21130033531. The next prime is 21130033609. The reversal of 21130033543 is 34533003112.

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-21130033543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130033643) 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, 51163 + ... + 211843.

It is an arithmetic number, because the mean of its divisors is an integer number (2668124610).

Almost surely, 2^21130033543 is an apocalyptic number.

21130033543 is a deficient number, since it is larger than the sum of its proper divisors (214963337).

21130033543 is a wasteful number, since it uses less digits than its factorization.

21130033543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162017.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 21130033543 its reverse (34533003112), we get a palindrome (55663036655).

The spelling of 21130033543 in words is "twenty-one billion, one hundred thirty million, thirty-three thousand, five hundred forty-three".