8990018881 has 4 divisors (see below), whose sum is σ = 8990473264. Its totient is φ = 8989564500.

The previous prime is 8990018867. The next prime is 8990018893. The reversal of 8990018881 is 1888100998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8990018881 - 2¹⁵ = 8989986113 is a prime.

It is a super-2 number, since 2×8990018881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8990018801) 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, 196095 + ... + 237556.

It is an arithmetic number, because the mean of its divisors is an integer number (2247618316).

Almost surely, 2^8990018881 is an apocalyptic number.

It is an amenable number.

8990018881 is a deficient number, since it is larger than the sum of its proper divisors (454383).

8990018881 is a wasteful number, since it uses less digits than its factorization.

8990018881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454382.

The product of its (nonzero) digits is 331776, while the sum is 52.

The square root of 8990018881 is about 94815.7100959540. The cubic root of 8990018881 is about 2079.3145917982.

The spelling of 8990018881 in words is "eight billion, nine hundred ninety million, eighteen thousand, eight hundred eighty-one".