20773456899 has 32 divisors (see below), whose sum is σ = 30177100800. Its totient is φ = 12634847232.

The previous prime is 20773456877. The next prime is 20773456909. The reversal of 20773456899 is 99865437702.

It is a Cunningham number, because it is equal to 144130²-1.

It is not a de Polignac number, because 20773456899 - 2¹⁶ = 20773391363 is a prime.

It is a super-2 number, since 2×20773456899² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20773456499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1868134 + ... + 1879220.

It is an arithmetic number, because the mean of its divisors is an integer number (943034400).

Almost surely, 2^20773456899 is an apocalyptic number.

20773456899 is a deficient number, since it is larger than the sum of its proper divisors (9403643901).

20773456899 is a wasteful number, since it uses less digits than its factorization.

20773456899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11659.

The product of its (nonzero) digits is 22861440, while the sum is 60.

The spelling of 20773456899 in words is "twenty billion, seven hundred seventy-three million, four hundred fifty-six thousand, eight hundred ninety-nine".