18945750 has 32 divisors (see below), whose sum is σ = 47290464. Its totient is φ = 5052000.

The previous prime is 18945727. The next prime is 18945779. The reversal of 18945750 is 5754981.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18945699 and 18945708.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 11881 + ... + 13380.

It is an arithmetic number, because the mean of its divisors is an integer number (1477827).

Almost surely, 2^18945750 is an apocalyptic number.

18945750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18945750 is an abundant number, since it is smaller than the sum of its proper divisors (28344714).

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

18945750 is a wasteful number, since it uses less digits than its factorization.

18945750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25281 (or 25271 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 18945750 is about 4352.6715934010. The cubic root of 18945750 is about 266.5859564772.

The spelling of 18945750 in words is "eighteen million, nine hundred forty-five thousand, seven hundred fifty".