18281076 has 24 divisors (see below), whose sum is σ = 46533984. Its totient is φ = 5539680.

The previous prime is 18281047. The next prime is 18281077. The reversal of 18281076 is 67018281.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18281077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69115 + ... + 69378.

It is an arithmetic number, because the mean of its divisors is an integer number (1938916).

Almost surely, 2^18281076 is an apocalyptic number.

It is an amenable number.

18281076 is an abundant number, since it is smaller than the sum of its proper divisors (28252908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18281076 is a wasteful number, since it uses less digits than its factorization.

18281076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138511 (or 138509 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 18281076 is about 4275.6374963273. The cubic root of 18281076 is about 263.4312249771.

The spelling of 18281076 in words is "eighteen million, two hundred eighty-one thousand, seventy-six".