18917141 has 8 divisors (see below), whose sum is σ = 21084480. Its totient is φ = 16867008.

The previous prime is 18917123. The next prime is 18917149. The reversal of 18917141 is 14171981.

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-18917141 is a prime.

It is a super-2 number, since 2×18917141² = 715716447227762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18917098 and 18917107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18917149) 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, 28961 + ... + 29606.

It is an arithmetic number, because the mean of its divisors is an integer number (2635560).

Almost surely, 2^18917141 is an apocalyptic number.

It is an amenable number.

18917141 is a deficient number, since it is larger than the sum of its proper divisors (2167339).

18917141 is a wasteful number, since it uses less digits than its factorization.

18917141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58603.

The product of its digits is 2016, while the sum is 32.

The square root of 18917141 is about 4349.3839793700. The cubic root of 18917141 is about 266.4517029766.

The spelling of 18917141 in words is "eighteen million, nine hundred seventeen thousand, one hundred forty-one".