20980773723 has 16 divisors (see below), whose sum is σ = 34429988096. Its totient is φ = 11066781600.

The previous prime is 20980773721. The next prime is 20980773757. The reversal of 20980773723 is 32737708902.

It is not a de Polignac number, because 20980773723 - 2¹ = 20980773721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20980773721) 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, 38426053 + ... + 38426598.

It is an arithmetic number, because the mean of its divisors is an integer number (2151874256).

Almost surely, 2^20980773723 is an apocalyptic number.

20980773723 is a deficient number, since it is larger than the sum of its proper divisors (13449214373).

20980773723 is a wasteful number, since it uses less digits than its factorization.

20980773723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76852674.

The product of its (nonzero) digits is 889056, while the sum is 48.

The spelling of 20980773723 in words is "twenty billion, nine hundred eighty million, seven hundred seventy-three thousand, seven hundred twenty-three".