18493000 has 32 divisors (see below), whose sum is σ = 43275960. Its totient is φ = 7396800.

The previous prime is 18492973. The next prime is 18493001. The reversal of 18493000 is 39481.

It can be written as a sum of positive squares in 4 ways, for example, as 4639716 + 13853284 = 2154^2 + 3722^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (18493001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8247 + ... + 10246.

Almost surely, 2^18493000 is an apocalyptic number.

18493000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18493000 is an abundant number, since it is smaller than the sum of its proper divisors (24782960).

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

18493000 is a wasteful number, since it uses less digits than its factorization.

18493000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18514 (or 18500 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 18493000 is about 4300.3488230608. The cubic root of 18493000 is about 264.4452617623.

The spelling of 18493000 in words is "eighteen million, four hundred ninety-three thousand".