18049536 has 60 divisors (see below), whose sum is σ = 52105482. Its totient is φ = 6014976.

The previous prime is 18049531. The next prime is 18049543. The reversal of 18049536 is 63594081.

18049536 is a `hidden beast` number, since 1 + 80 + 49 + 536 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 5089536 = 3600^2 + 2256^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18049536.

It is not an unprimeable number, because it can be changed into a prime (18049531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2650 + ... + 6566.

Almost surely, 2^18049536 is an apocalyptic number.

18049536 is a gapful number since it is divisible by the number (16) 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 18049536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26052741).

18049536 is an abundant number, since it is smaller than the sum of its proper divisors (34055946).

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

18049536 is an equidigital number, since it uses as much as digits as its factorization.

18049536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941 (or 3922 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 18049536 is about 4248.4745497649. The cubic root of 18049536 is about 262.3143285658.

The spelling of 18049536 in words is "eighteen million, forty-nine thousand, five hundred thirty-six".