18124881 has 8 divisors (see below), whose sum is σ = 24218880. Its totient is φ = 12057072.

The previous prime is 18124877. The next prime is 18124889. The reversal of 18124881 is 18842181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18124881 - 2² = 18124877 is a prime.

It is a super-2 number, since 2×18124881² = 657022622528322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18124889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4870 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (3027360).

Almost surely, 2^18124881 is an apocalyptic number.

It is an amenable number.

18124881 is a deficient number, since it is larger than the sum of its proper divisors (6093999).

18124881 is a wasteful number, since it uses less digits than its factorization.

18124881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13095.

The product of its digits is 4096, while the sum is 33.

The square root of 18124881 is about 4257.3326156174. The cubic root of 18124881 is about 262.6788187480.

The spelling of 18124881 in words is "eighteen million, one hundred twenty-four thousand, eight hundred eighty-one".