18883881 has 16 divisors (see below), whose sum is σ = 28073920. Its totient is φ = 12545280.

The previous prime is 18883873. The next prime is 18883913. The reversal of 18883881 is 18838881.

It is a happy number.

It is not a de Polignac number, because 18883881 - 2³ = 18883873 is a prime.

It is a super-2 number, since 2×18883881² = 713201923244322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18883841) 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, 7881 + ... + 9993.

It is an arithmetic number, because the mean of its divisors is an integer number (1754620).

Almost surely, 2^18883881 is an apocalyptic number.

It is an amenable number.

18883881 is a deficient number, since it is larger than the sum of its proper divisors (9190039).

18883881 is a wasteful number, since it uses less digits than its factorization.

18883881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453 (or 2447 counting only the distinct ones).

The product of its digits is 98304, while the sum is 45.

The square root of 18883881 is about 4345.5587672933. The cubic root of 18883881 is about 266.2954534579.

The spelling of 18883881 in words is "eighteen million, eight hundred eighty-three thousand, eight hundred eighty-one".