18489801 has 8 divisors (see below), whose sum is σ = 26894304. Its totient is φ = 11205920.

The previous prime is 18489781. The next prime is 18489817. The reversal of 18489801 is 10898481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18489801 - 2⁷ = 18489673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18489801.

It is not an unprimeable number, because it can be changed into a prime (18489841) 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, 280116 + ... + 280181.

It is an arithmetic number, because the mean of its divisors is an integer number (3361788).

Almost surely, 2^18489801 is an apocalyptic number.

18489801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18489801 is a deficient number, since it is larger than the sum of its proper divisors (8404503).

18489801 is a wasteful number, since it uses less digits than its factorization.

18489801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560311.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 18489801 is about 4299.9768604029. The cubic root of 18489801 is about 264.4300125838.

The spelling of 18489801 in words is "eighteen million, four hundred eighty-nine thousand, eight hundred one".