18963750 has 80 divisors (see below), whose sum is σ = 51171120. Its totient is φ = 4656000.

The previous prime is 18963743. The next prime is 18963751. The reversal of 18963750 is 5736981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 18963699 and 18963708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18963751) 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 39 ways as a sum of consecutive naturals, for example, 48556 + ... + 48944.

It is an arithmetic number, because the mean of its divisors is an integer number (639639).

Almost surely, 2^18963750 is an apocalyptic number.

18963750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18963750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25585560).

18963750 is an abundant number, since it is smaller than the sum of its proper divisors (32207370).

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

18963750 is a wasteful number, since it uses less digits than its factorization.

18963750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 18963750 is about 4354.7387981370. The cubic root of 18963750 is about 266.6703558517.

The spelling of 18963750 in words is "eighteen million, nine hundred sixty-three thousand, seven hundred fifty".