20793223249 has 4 divisors (see below), whose sum is σ = 21887603440. Its totient is φ = 19698843060.

The previous prime is 20793223219. The next prime is 20793223289. The reversal of 20793223249 is 94232239702.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94232239702 = 2 ⋅47116119851.

It is a cyclic number.

It is not a de Polignac number, because 20793223249 - 2²³ = 20784834641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20793223219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547190067 + ... + 547190104.

It is an arithmetic number, because the mean of its divisors is an integer number (5471900860).

Almost surely, 2^20793223249 is an apocalyptic number.

It is an amenable number.

20793223249 is a deficient number, since it is larger than the sum of its proper divisors (1094380191).

20793223249 is a wasteful number, since it uses less digits than its factorization.

20793223249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094380190.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 20793223249 in words is "twenty billion, seven hundred ninety-three million, two hundred twenty-three thousand, two hundred forty-nine".