18489601 has 4 divisors (see below), whose sum is σ = 19911892. Its totient is φ = 17067312.

The previous prime is 18489571. The next prime is 18489623. The reversal of 18489601 is 10698481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10698481 = 1019 ⋅10499.

It can be written as a sum of positive squares in 2 ways, for example, as 1050625 + 17438976 = 1025^2 + 4176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18489601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18489101) 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 3 ways as a sum of consecutive naturals, for example, 711126 + ... + 711151.

It is an arithmetic number, because the mean of its divisors is an integer number (4977973).

Almost surely, 2^18489601 is an apocalyptic number.

It is an amenable number.

18489601 is a deficient number, since it is larger than the sum of its proper divisors (1422291).

18489601 is a wasteful number, since it uses less digits than its factorization.

18489601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422290.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18489601 is about 4299.9536044009. The cubic root of 18489601 is about 264.4290591538.

It can be divided in two parts, 1848 and 9601, that added together give a square (11449 = 107²).

The spelling of 18489601 in words is "eighteen million, four hundred eighty-nine thousand, six hundred one".