20773456901 has 16 divisors (see below), whose sum is σ = 22425987888. Its totient is φ = 19169280000.

The previous prime is 20773456877. The next prime is 20773456909. The reversal of 20773456901 is 10965437702.

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

It can be written as a sum of positive squares in 8 ways, for example, as 14975395876 + 5798061025 = 122374^2 + 76145^2 .

It is a cyclic number.

It is not a de Polignac number, because 20773456901 - 2²⁶ = 20706348037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20773456909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1435301 + ... + 1449701.

It is an arithmetic number, because the mean of its divisors is an integer number (1401624243).

Almost surely, 2^20773456901 is an apocalyptic number.

It is an amenable number.

20773456901 is a deficient number, since it is larger than the sum of its proper divisors (1652530987).

20773456901 is a wasteful number, since it uses less digits than its factorization.

20773456901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16072.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 20773456901 in words is "twenty billion, seven hundred seventy-three million, four hundred fifty-six thousand, nine hundred one".