21143204033 has 4 divisors (see below), whose sum is σ = 24163661760. Its totient is φ = 18122746308.

The previous prime is 21143203999. The next prime is 21143204057. The reversal of 21143204033 is 33040234112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21143204033 - 2¹⁰ = 21143203009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21143204063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1510228853 + ... + 1510228866.

It is an arithmetic number, because the mean of its divisors is an integer number (6040915440).

Almost surely, 2^21143204033 is an apocalyptic number.

It is an amenable number.

21143204033 is a deficient number, since it is larger than the sum of its proper divisors (3020457727).

21143204033 is an equidigital number, since it uses as much as digits as its factorization.

21143204033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020457726.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21143204033 its reverse (33040234112), we get a palindrome (54183438145).

The spelling of 21143204033 in words is "twenty-one billion, one hundred forty-three million, two hundred four thousand, thirty-three".