20280323279 has 4 divisors (see below), whose sum is σ = 20364474240. Its totient is φ = 20196172320.

The previous prime is 20280323269. The next prime is 20280323317. The reversal of 20280323279 is 97232308202.

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 20280323279 - 2⁴ = 20280323263 is a prime.

It is a super-2 number, since 2×20280323279² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20280323269) 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, 42075119 + ... + 42075600.

It is an arithmetic number, because the mean of its divisors is an integer number (5091118560).

Almost surely, 2^20280323279 is an apocalyptic number.

20280323279 is a deficient number, since it is larger than the sum of its proper divisors (84150961).

20280323279 is an equidigital number, since it uses as much as digits as its factorization.

20280323279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84150960.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 20280323279 in words is "twenty billion, two hundred eighty million, three hundred twenty-three thousand, two hundred seventy-nine".