21839012033 has 4 divisors (see below), whose sum is σ = 21884605440. Its totient is φ = 21793418628.

The previous prime is 21839011951. The next prime is 21839012087. The reversal of 21839012033 is 33021093812.

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 21839012033 - 2²⁰ = 21837963457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21839012633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22795985 + ... + 22796942.

It is an arithmetic number, because the mean of its divisors is an integer number (5471151360).

Almost surely, 2^21839012033 is an apocalyptic number.

It is an amenable number.

21839012033 is a deficient number, since it is larger than the sum of its proper divisors (45593407).

21839012033 is an equidigital number, since it uses as much as digits as its factorization.

21839012033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45593406.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 21839012033 in words is "twenty-one billion, eight hundred thirty-nine million, twelve thousand, thirty-three".