18350091 has 8 divisors (see below), whose sum is σ = 27185360. Its totient is φ = 12233376.

The previous prime is 18350063. The next prime is 18350093. The reversal of 18350091 is 19005381.

It is not a de Polignac number, because 18350091 - 2⁷ = 18349963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 679633 = 18350091 / (1 + 8 + 3 + 5 + 0 + 0 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18350093) 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, 339790 + ... + 339843.

It is an arithmetic number, because the mean of its divisors is an integer number (3398170).

Almost surely, 2^18350091 is an apocalyptic number.

18350091 is a deficient number, since it is larger than the sum of its proper divisors (8835269).

18350091 is an equidigital number, since it uses as much as digits as its factorization.

18350091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679642 (or 679636 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 18350091 is about 4283.7006197913. The cubic root of 18350091 is about 263.7623118920.

The spelling of 18350091 in words is "eighteen million, three hundred fifty thousand, ninety-one".