18397119 has 8 divisors (see below), whose sum is σ = 26416432. Its totient is φ = 11321280.

The previous prime is 18397109. The next prime is 18397121. The reversal of 18397119 is 91179381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18397119 - 2⁸ = 18396863 is a prime.

It is a super-2 number, since 2×18397119² = 676907975000322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 471721 = 18397119 / (1 + 8 + 3 + 9 + 7 + 1 + 1 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397109) 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, 235822 + ... + 235899.

It is an arithmetic number, because the mean of its divisors is an integer number (3302054).

Almost surely, 2^18397119 is an apocalyptic number.

18397119 is a deficient number, since it is larger than the sum of its proper divisors (8019313).

18397119 is a wasteful number, since it uses less digits than its factorization.

18397119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471737.

The product of its digits is 13608, while the sum is 39.

The square root of 18397119 is about 4289.1862864651. The cubic root of 18397119 is about 263.9874448804.

The spelling of 18397119 in words is "eighteen million, three hundred ninety-seven thousand, one hundred nineteen".