18763930 has 16 divisors (see below), whose sum is σ = 33841224. Its totient is φ = 7490880.

The previous prime is 18763919. The next prime is 18763933. The reversal of 18763930 is 3936781.

It can be written as a sum of positive squares in 4 ways, for example, as 13741849 + 5022081 = 3707^2 + 2241^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18763930.

It is not an unprimeable number, because it can be changed into a prime (18763933) by changing a digit.

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, 4600 + ... + 7660.

Almost surely, 2^18763930 is an apocalyptic number.

18763930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18763930 is a deficient number, since it is larger than the sum of its proper divisors (15077294).

18763930 is a wasteful number, since it uses less digits than its factorization.

18763930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 18763930 is about 4331.7352181314. The cubic root of 18763930 is about 265.7304163825.

The spelling of 18763930 in words is "eighteen million, seven hundred sixty-three thousand, nine hundred thirty".