18768790 has 16 divisors (see below), whose sum is σ = 34192368. Its totient is φ = 7416736.

The previous prime is 18768773. The next prime is 18768793. The reversal of 18768790 is 9786781.

It is a self number, because there is not a number n which added to its sum of digits gives 18768790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18768793) 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, 10477 + ... + 12136.

It is an arithmetic number, because the mean of its divisors is an integer number (2137023).

Almost surely, 2^18768790 is an apocalyptic number.

18768790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18768790 is a deficient number, since it is larger than the sum of its proper divisors (15423578).

18768790 is a wasteful number, since it uses less digits than its factorization.

18768790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22703.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 18768790 is about 4332.2961579283. The cubic root of 18768790 is about 265.7533564656.

Subtracting from 18768790 its reverse (9786781), we obtain a square (8982009 = 2997²).

The spelling of 18768790 in words is "eighteen million, seven hundred sixty-eight thousand, seven hundred ninety".