18690048 has 156 divisors (see below), whose sum is σ = 59958120. Its totient is φ = 5750784.

The previous prime is 18690047. The next prime is 18690059. The reversal of 18690048 is 84009681.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (156).

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

It is a junction number, because it is equal to n+sod(n) for n = 18689994 and 18690021.

It is not an unprimeable number, because it can be changed into a prime (18690041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1437690 + ... + 1437702.

Almost surely, 2^18690048 is an apocalyptic number.

18690048 is a gapful number since it is divisible by the number (18) 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 18690048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29979060).

18690048 is an abundant number, since it is smaller than the sum of its proper divisors (41268072).

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

18690048 is an equidigital number, since it uses as much as digits as its factorization.

18690048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18690048 is about 4323.1988156919. The cubic root of 18690048 is about 265.3811910566.

The spelling of 18690048 in words is "eighteen million, six hundred ninety thousand, forty-eight".