18764330 has 16 divisors (see below), whose sum is σ = 36374184. Its totient is φ = 6928320.

The previous prime is 18764329. The next prime is 18764351. The reversal of 18764330 is 3346781.

It can be written as a sum of positive squares in 4 ways, for example, as 9296401 + 9467929 = 3049^2 + 3077^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72041 + ... + 72300.

Almost surely, 2^18764330 is an apocalyptic number.

18764330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18764330 is a deficient number, since it is larger than the sum of its proper divisors (17609854).

18764330 is a wasteful number, since it uses less digits than its factorization.

18764330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144361.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 18764330 is about 4331.7813887591. The cubic root of 18764330 is about 265.7323046048.

The spelling of 18764330 in words is "eighteen million, seven hundred sixty-four thousand, three hundred thirty".