18009877 has 8 divisors (see below), whose sum is σ = 18416160. Its totient is φ = 17606160.

The previous prime is 18009857. The next prime is 18009881. The reversal of 18009877 is 77890081.

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-18009877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009857) 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, 21802 + ... + 22612.

It is an arithmetic number, because the mean of its divisors is an integer number (2302020).

Almost surely, 2^18009877 is an apocalyptic number.

It is an amenable number.

18009877 is a deficient number, since it is larger than the sum of its proper divisors (406283).

18009877 is an equidigital number, since it uses as much as digits as its factorization.

18009877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 18009877 is about 4243.8045430957. The cubic root of 18009877 is about 262.1220659572.

The spelling of 18009877 in words is "eighteen million, nine thousand, eight hundred seventy-seven".