21033949283 has 4 divisors (see below), whose sum is σ = 21712463808. Its totient is φ = 20355434760.

The previous prime is 21033949253. The next prime is 21033949289. The reversal of 21033949283 is 38294933012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21033949283 - 2⁶ = 21033949219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033949289) 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, 339257216 + ... + 339257277.

It is an arithmetic number, because the mean of its divisors is an integer number (5428115952).

Almost surely, 2^21033949283 is an apocalyptic number.

21033949283 is a deficient number, since it is larger than the sum of its proper divisors (678514525).

21033949283 is an equidigital number, since it uses as much as digits as its factorization.

21033949283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678514524.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 21033949283 in words is "twenty-one billion, thirty-three million, nine hundred forty-nine thousand, two hundred eighty-three".