18418750 has 48 divisors (see below), whose sum is σ = 39559968. Its totient is φ = 6300000.

The previous prime is 18418739. The next prime is 18418759. The reversal of 18418750 is 5781481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18418759) 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 23 ways as a sum of consecutive naturals, for example, 43540 + ... + 43960.

It is an arithmetic number, because the mean of its divisors is an integer number (824166).

Almost surely, 2^18418750 is an apocalyptic number.

18418750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18418750 is an abundant number, since it is smaller than the sum of its proper divisors (21141218).

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

18418750 is an frugal number, since it uses more digits than its factorization.

18418750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 18418750 is about 4291.7071195504. The cubic root of 18418750 is about 264.0908682453.

The spelling of 18418750 in words is "eighteen million, four hundred eighteen thousand, seven hundred fifty".