8021723240881 has 24 divisors (see below), whose sum is σ = 9972637115616. Its totient is φ = 6410826576000.

The previous prime is 8021723240857. The next prime is 8021723240887. The reversal of 8021723240881 is 1880423271208.

It is a happy number.

It is not a de Polignac number, because 8021723240881 - 2¹³ = 8021723232689 is a prime.

It is a super-2 number, since 2×8021723240881² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8021723240887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44910495 + ... + 45088756.

It is an arithmetic number, because the mean of its divisors is an integer number (415526546484).

Almost surely, 2^{8021723240881} is an apocalyptic number.

It is an amenable number.

8021723240881 is a deficient number, since it is larger than the sum of its proper divisors (1950913874735).

8021723240881 is a wasteful number, since it uses less digits than its factorization.

8021723240881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89999389 (or 89999382 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 8021723240881 in words is "eight trillion, twenty-one billion, seven hundred twenty-three million, two hundred forty thousand, eight hundred eighty-one".