18504901 has 8 divisors (see below), whose sum is σ = 18810144. Its totient is φ = 18202320.

The previous prime is 18504883. The next prime is 18504919. The reversal of 18504901 is 10940581.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18504883) and next prime (18504919).

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

It is a cyclic number.

It is not a de Polignac number, because 18504901 - 2⁵ = 18504869 is a prime.

It is a super-2 number, since 2×18504901² = 684862722039602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18504901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18504961) 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, 16911 + ... + 17971.

It is an arithmetic number, because the mean of its divisors is an integer number (2351268).

Almost surely, 2^18504901 is an apocalyptic number.

It is an amenable number.

18504901 is a deficient number, since it is larger than the sum of its proper divisors (305243).

18504901 is a wasteful number, since it uses less digits than its factorization.

18504901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 18504901 is about 4301.7323254708. The cubic root of 18504901 is about 264.5019767030.

The spelling of 18504901 in words is "eighteen million, five hundred four thousand, nine hundred one".