20881369170723 has 4 divisors (see below), whose sum is σ = 27841825560968. Its totient is φ = 13920912780480.

The previous prime is 20881369170671. The next prime is 20881369170793. The reversal of 20881369170723 is 32707196318802.

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

It is not a de Polignac number, because 20881369170723 - 2⁶ = 20881369170659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20881369170793) 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, 3480228195118 + ... + 3480228195123.

It is an arithmetic number, because the mean of its divisors is an integer number (6960456390242).

Almost surely, 2^{20881369170723} is an apocalyptic number.

20881369170723 is a deficient number, since it is larger than the sum of its proper divisors (6960456390245).

20881369170723 is an equidigital number, since it uses as much as digits as its factorization.

20881369170723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960456390244.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 20881369170723 in words is "twenty trillion, eight hundred eighty-one billion, three hundred sixty-nine million, one hundred seventy thousand, seven hundred twenty-three".