18426091 has 2 divisors, whose sum is σ = 18426092. Its totient is φ = 18426090.

The previous prime is 18426071. The next prime is 18426101. The reversal of 18426091 is 19062481.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18426091 is a prime.

It is not a weakly prime, because it can be changed into another prime (18426041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9213045 + 9213046.

It is an arithmetic number, because the mean of its divisors is an integer number (9213046).

Almost surely, 2^18426091 is an apocalyptic number.

18426091 is a deficient number, since it is larger than the sum of its proper divisors (1).

18426091 is an equidigital number, since it uses as much as digits as its factorization.

18426091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18426091 is about 4292.5622884240. The cubic root of 18426091 is about 264.1259490472.

The spelling of 18426091 in words is "eighteen million, four hundred twenty-six thousand, ninety-one".