21432949283 has 4 divisors (see below), whose sum is σ = 21931390008. Its totient is φ = 20934508560.

The previous prime is 21432949273. The next prime is 21432949289. The reversal of 21432949283 is 38294923412.

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 21432949283 - 2⁴ = 21432949267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432949289) 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, 249220298 + ... + 249220383.

It is an arithmetic number, because the mean of its divisors is an integer number (5482847502).

Almost surely, 2^21432949283 is an apocalyptic number.

21432949283 is a deficient number, since it is larger than the sum of its proper divisors (498440725).

21432949283 is an equidigital number, since it uses as much as digits as its factorization.

21432949283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498440724.

The product of its digits is 746496, while the sum is 47.

The spelling of 21432949283 in words is "twenty-one billion, four hundred thirty-two million, nine hundred forty-nine thousand, two hundred eighty-three".