18163901 has 8 divisors (see below), whose sum is σ = 21069120. Its totient is φ = 15336288.

The previous prime is 18163891. The next prime is 18163907. The reversal of 18163901 is 10936181.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18163901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18163907) 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, 18896 + ... + 19833.

It is an arithmetic number, because the mean of its divisors is an integer number (2633640).

Almost surely, 2^18163901 is an apocalyptic number.

It is an amenable number.

18163901 is a deficient number, since it is larger than the sum of its proper divisors (2905219).

18163901 is an equidigital number, since it uses as much as digits as its factorization.

18163901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38803.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 18163901 is about 4261.9128334587. The cubic root of 18163901 is about 262.8671856113.

The spelling of 18163901 in words is "eighteen million, one hundred sixty-three thousand, nine hundred one".