20873830769 has 4 divisors (see below), whose sum is σ = 22771451760. Its totient is φ = 18976209780.

The previous prime is 20873830759. The next prime is 20873830777. The reversal of 20873830769 is 96703837802.

It is a happy number.

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.

It is not a de Polignac number, because 20873830769 - 2¹⁶ = 20873765233 is a prime.

It is a super-2 number, since 2×20873830769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20873830769.

It is not an unprimeable number, because it can be changed into a prime (20873830729) 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, 948810479 + ... + 948810500.

It is an arithmetic number, because the mean of its divisors is an integer number (5692862940).

Almost surely, 2^20873830769 is an apocalyptic number.

It is an amenable number.

20873830769 is a deficient number, since it is larger than the sum of its proper divisors (1897620991).

20873830769 is a wasteful number, since it uses less digits than its factorization.

20873830769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897620990.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 20873830769 in words is "twenty billion, eight hundred seventy-three million, eight hundred thirty thousand, seven hundred sixty-nine".