21144545333 has 16 divisors (see below), whose sum is σ = 22476579840. Its totient is φ = 19835103600.

The previous prime is 21144545327. The next prime is 21144545353. The reversal of 21144545333 is 33354544112.

It is a cyclic number.

It is not a de Polignac number, because 21144545333 - 2⁸ = 21144545077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21144545293 and 21144545302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144545353) 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, 1153268 + ... + 1171458.

It is an arithmetic number, because the mean of its divisors is an integer number (1404786240).

Almost surely, 2^21144545333 is an apocalyptic number.

It is an amenable number.

21144545333 is a deficient number, since it is larger than the sum of its proper divisors (1332034507).

21144545333 is a wasteful number, since it uses less digits than its factorization.

21144545333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18808.

The product of its digits is 86400, while the sum is 35.

The spelling of 21144545333 in words is "twenty-one billion, one hundred forty-four million, five hundred forty-five thousand, three hundred thirty-three".