21133304233443 has 16 divisors (see below), whose sum is σ = 31839253084800. Its totient is φ = 13850075089800.

The previous prime is 21133304233429. The next prime is 21133304233451. The reversal of 21133304233443 is 34433240333112.

21133304233443 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 3 + 304 + 2 + 3 + 344 + 3 = 666.

It is not a de Polignac number, because 21133304233443 - 2⁴ = 21133304233427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21133304233398 and 21133304233407.

It is not an unprimeable number, because it can be changed into a prime (21133304233453) 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, 6633176133 + ... + 6633179318.

It is an arithmetic number, because the mean of its divisors is an integer number (1989953317800).

Almost surely, 2^{21133304233443} is an apocalyptic number.

21133304233443 is a deficient number, since it is larger than the sum of its proper divisors (10705948851357).

21133304233443 is a wasteful number, since it uses less digits than its factorization.

21133304233443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13266355519 (or 13266355513 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 36.

Adding to 21133304233443 its reverse (34433240333112), we get a palindrome (55566544566555).

The spelling of 21133304233443 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred four million, two hundred thirty-three thousand, four hundred forty-three".