18968750 has 28 divisors (see below), whose sum is σ = 35624544. Its totient is φ = 7575000.

The previous prime is 18968749. The next prime is 18968759. The reversal of 18968750 is 5786981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18968759) 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 13 ways as a sum of consecutive naturals, for example, 30947 + ... + 31553.

Almost surely, 2^18968750 is an apocalyptic number.

18968750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18968750 is a deficient number, since it is larger than the sum of its proper divisors (16655794).

18968750 is an frugal number, since it uses more digits than its factorization.

18968750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 18968750 is about 4355.3128475461. The cubic root of 18968750 is about 266.6937906438.

The spelling of 18968750 in words is "eighteen million, nine hundred sixty-eight thousand, seven hundred fifty".