18490101 has 40 divisors (see below), whose sum is σ = 30654144. Its totient is φ = 9878400.

The previous prime is 18490099. The next prime is 18490103. The reversal of 18490101 is 10109481.

It is an interprime number because it is at equal distance from previous prime (18490099) and next prime (18490103).

It is not a de Polignac number, because 18490101 - 2¹ = 18490099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18490103) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 122376 + ... + 122526.

Almost surely, 2^18490101 is an apocalyptic number.

It is an amenable number.

18490101 is a deficient number, since it is larger than the sum of its proper divisors (12164043).

18490101 is an equidigital number, since it uses as much as digits as its factorization.

18490101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 18490101 is about 4300.0117441700. The cubic root of 18490101 is about 264.4314427159.

Adding to 18490101 its reverse (10109481), we get a palindrome (28599582).

The spelling of 18490101 in words is "eighteen million, four hundred ninety thousand, one hundred one".