18147790 has 16 divisors (see below), whose sum is σ = 32838768. Its totient is φ = 7220736.

The previous prime is 18147769. The next prime is 18147839. The reversal of 18147790 is 9774181.

It is a congruent number.

It is an unprimeable number.

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, 2772 + ... + 6631.

It is an arithmetic number, because the mean of its divisors is an integer number (2052423).

Almost surely, 2^18147790 is an apocalyptic number.

18147790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18147790 is a deficient number, since it is larger than the sum of its proper divisors (14690978).

18147790 is a wasteful number, since it uses less digits than its factorization.

18147790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9603.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 18147790 is about 4260.0223004111. The cubic root of 18147790 is about 262.7894433910.

It can be divided in two parts, 1814 and 7790, that added together give a square (9604 = 98²).

The spelling of 18147790 in words is "eighteen million, one hundred forty-seven thousand, seven hundred ninety".