21940650283 has 4 divisors (see below), whose sum is σ = 22450898008. Its totient is φ = 21430402560.

The previous prime is 21940650247. The next prime is 21940650293. The reversal of 21940650283 is 38205604912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21940650283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21940650233) 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, 255123798 + ... + 255123883.

It is an arithmetic number, because the mean of its divisors is an integer number (5612724502).

Almost surely, 2^21940650283 is an apocalyptic number.

21940650283 is a deficient number, since it is larger than the sum of its proper divisors (510247725).

21940650283 is an equidigital number, since it uses as much as digits as its factorization.

21940650283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510247724.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 21940650283 in words is "twenty-one billion, nine hundred forty million, six hundred fifty thousand, two hundred eighty-three".