18102091 has 8 divisors (see below), whose sum is σ = 20805120. Its totient is φ = 15428328.

The previous prime is 18102083. The next prime is 18102101. The reversal of 18102091 is 19020181.

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 18102091 - 2³ = 18102083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18102391) 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, 5971 + ... + 8476.

It is an arithmetic number, because the mean of its divisors is an integer number (2600640).

Almost surely, 2^18102091 is an apocalyptic number.

18102091 is a deficient number, since it is larger than the sum of its proper divisors (2703029).

18102091 is a wasteful number, since it uses less digits than its factorization.

18102091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14633.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 18102091 is about 4254.6552151731. The cubic root of 18102091 is about 262.5686762110.

The spelling of 18102091 in words is "eighteen million, one hundred two thousand, ninety-one".