18956000 has 96 divisors (see below), whose sum is σ = 53307072. Its totient is φ = 6489600.

The previous prime is 18955987. The next prime is 18956009. The reversal of 18956000 is 65981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18956009) 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 15 ways as a sum of consecutive naturals, for example, 27662 + ... + 28338.

It is an arithmetic number, because the mean of its divisors is an integer number (555282).

Almost surely, 2^18956000 is an apocalyptic number.

18956000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18956000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26653536).

18956000 is an abundant number, since it is smaller than the sum of its proper divisors (34351072).

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

18956000 is an equidigital number, since it uses as much as digits as its factorization.

18956000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 18956000 is about 4353.8488719752. The cubic root of 18956000 is about 266.6340237821.

The spelling of 18956000 in words is "eighteen million, nine hundred fifty-six thousand".