8813805381 has 24 divisors (see below), whose sum is σ = 12889333184. Its totient is φ = 5803073280.

The previous prime is 8813805379. The next prime is 8813805421. The reversal of 8813805381 is 1835083188.

It is a happy number.

8813805381 is a `hidden beast` number, since 8 + 81 + 38 + 0 + 538 + 1 = 666.

It is not a de Polignac number, because 8813805381 - 2¹ = 8813805379 is a prime.

It is a super-2 number, since 2×8813805381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8813805361) 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, 414786 + ... + 435516.

Almost surely, 2^8813805381 is an apocalyptic number.

It is an amenable number.

8813805381 is a deficient number, since it is larger than the sum of its proper divisors (4075527803).

8813805381 is a wasteful number, since it uses less digits than its factorization.

8813805381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21321 (or 21318 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 8813805381 is about 93881.8692879514. The cubic root of 8813805381 is about 2065.6392895854.

The spelling of 8813805381 in words is "eight billion, eight hundred thirteen million, eight hundred five thousand, three hundred eighty-one".