20773107723 has 4 divisors (see below), whose sum is σ = 27697476968. Its totient is φ = 13848738480.

The previous prime is 20773107697. The next prime is 20773107743. The reversal of 20773107723 is 32770137702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20773107723 - 2²¹ = 20771010571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20773107743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3462184618 + ... + 3462184623.

It is an arithmetic number, because the mean of its divisors is an integer number (6924369242).

Almost surely, 2^20773107723 is an apocalyptic number.

20773107723 is a deficient number, since it is larger than the sum of its proper divisors (6924369245).

20773107723 is an equidigital number, since it uses as much as digits as its factorization.

20773107723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924369244.

The product of its (nonzero) digits is 86436, while the sum is 39.

The spelling of 20773107723 in words is "twenty billion, seven hundred seventy-three million, one hundred seven thousand, seven hundred twenty-three".