18750930 has 32 divisors (see below), whose sum is σ = 49094208. Its totient is φ = 4545600.

The previous prime is 18750917. The next prime is 18750931. The reversal of 18750930 is 3905781.

It is a super-3 number, since 3×18750930³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18750891 and 18750900.

It is not an unprimeable number, because it can be changed into a prime (18750931) 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 15 ways as a sum of consecutive naturals, for example, 28081 + ... + 28740.

It is an arithmetic number, because the mean of its divisors is an integer number (1534194).

Almost surely, 2^18750930 is an apocalyptic number.

18750930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18750930 is an abundant number, since it is smaller than the sum of its proper divisors (30343278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18750930 is a wasteful number, since it uses less digits than its factorization.

18750930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56842.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 18750930 is about 4330.2344047407. The cubic root of 18750930 is about 265.6690345451.

The spelling of 18750930 in words is "eighteen million, seven hundred fifty thousand, nine hundred thirty".